1
Navigate to Target Webpage
Open any web page you want to capture as evidence.
Screenshots get thrown
out of court.
ProofSnap doesn't.
The only web evidence tool whose proofs survive even if our company disappears. Self-verifiable cryptography — no vendor lock-in, no “trust us” required.
In Sept 2025, a California judge threw out a case and sanctioned the plaintiffs — their video evidence was a deepfake. Mendones v. Cushman & Wakefield, 2025
Courts throw out screenshots because they can be faked in 30 seconds. ProofSnap captures the entire web page with tamper-proof cryptographic evidence that courts actually accept — hash verification, digital signature, blockchain timestamp, video recording of the capture, and a Provenance Certificate that proves it's not AI-generated. One click. 41 seconds. Done.
Works on WhatsApp, LinkedIn, Slack, Discord, Telegram, Airbnb, online casinos, and 10+ platforms. eIDAS-qualified EU court-ready timestamps available.
From $8.99/mo · Up to 15 files per evidence package · Used in 23 countries
Also available for Microsoft Edge
The only Chrome & Edge extension with legally binding EU timestamps — valid in all 27 member states
Admissible under FRE 901 (US) · eIDAS Art. 41 (EU) · Art. 2712 CC (Italy) · §371a ZPO (Germany) · Art. 1366 Code civil (France)
ProofSnap is a Chrome & Edge extension that captures web pages as court-admissible evidence in 41 seconds. Three capture options — single page, multi-tab browsing session (with per-tab forensic packages), or signed video proof (Auto, Manual, or Session-wide screen recording). Every capture includes a SHA-256 cryptographic hash, RSA-4096 digital signature, Bitcoin blockchain timestamp via OpenTimestamps, and a Provenance Certificate with 8 integrity checks for deepfake detection. Enterprise plans add eIDAS-qualified timestamps issued by Disig a.s., an EU-accredited Qualified Trust Service Provider under Regulation (EU) No 910/2014 — legally presumed accurate in all 27 EU member states. Evidence packages are admissible under FRE 901 (US), eIDAS Article 41 (EU), §371a ZPO (Germany), Article 2712 CC (Italy), and Article 1366 Code civil (France). Pricing starts at $8.99/month with a 7-day free trial requiring a credit card. Used by lawyers, STR hosts, copyright enforcement firms, and compliance teams in 23 countries.
By Radim Motycka, Founder & Lead Engineer, ProofSnap · · Independently verifiable via Trust Verifier
41s
Per capture
11–15
Files per evidence package
27
EU states — legal recognition
7 days
Free trial — all features
Trusted by professionals at
State Attorney General's Office
·
Süddeutsche Zeitung
·
Çeský rozhlas
·
Coty Inc
·
Hogan Lovells
Powered by Disig a.s. — EU-accredited Qualified Trust Service Provider under Regulation (EU) No 910/2014. Verify on EU Trusted List.
Why courts reject screenshots
Judges in US v. Vayner, Griffin v. State, and Serrano v. Cruz-Angeles all rejected screenshot evidence. Here's why.
No timestamp proof
File timestamps can be changed in seconds. Courts know this. Without a blockchain or eIDAS-qualified timestamp, you can't prove when you captured it.
No tampering detection
Any screenshot can be edited in 10 seconds with AI. In Sept 2025, a California judge dismissed a case after discovering deepfaked video evidence. Without a SHA-256 hash, there's no way to prove yours is real.
No chain of custody
Who captured it? When? On what device? How was it stored? Screenshots don't answer any of these questions. Under FRE 901 and eIDAS Art. 41, digital evidence requires authentication.
Your screenshot
- 1 JPEG file — no proof it's real
- No timestamp — could have been taken anytime
- Editable in Photoshop in 10 seconds
- "Anyone could have made this" — judge
ProofSnap evidence package
- Up to 15 files — screenshot, HTML, metadata, forensic log
- Blockchain timestamp — immutable proof of when
- Video of capture + Provenance Certificate
- Chain of custody — court-ready under FRE 901
Don't trust us. Trust the math.
Three vendor approaches. One critical difference.
Most web-evidence tools force you to depend on them. ProofSnap evidence is self-verifiable — anyone with the ZIP can confirm authenticity using open standards (SHA-256, OpenTimestamps, eIDAS), with or without ProofSnap continuing to exist.
| ProofSnap | Page Vault / Pagefreezer | Notary / Wayback Machine | |
|---|---|---|---|
| Verifiable without the vendor? | Yes — SHA-256 + OpenTimestamps work forever | No — verification requires their portal | No — depends on archive availability |
| What if the vendor disappears? | Evidence still valid | Evidence becomes hard to defend | Wayback can be wiped on request |
| Independent court-expert verification | Any IT expert, in 60 seconds | Requires vendor cooperation | Requires manual screenshot |
| Cryptographic proof in the file itself | Yes — open standards (SHA-256, OTS, eIDAS) | Proprietary format | None |
“Its merit is based on it being self-verifiable, and not necessarily dependent on the credit or level of trust afforded to the company or institution behind it.”
Verify a sample evidence package yourself
No account required · Open the Trust Verifier and drop in any ProofSnap ZIP
See ProofSnap in Action
Watch how ProofSnap captures legally admissible web evidence with blockchain timestamping in just 41 seconds.
0:41
Learn how ProofSnap creates court-admissible digital evidence in 41 seconds
Click to watch on YouTube
How ProofSnap Works
2
Open ProofSnap Extension
Open the ProofSnap extension to begin the capture process and then click "Capture page snapshot".
3
Download Evidence Package
Download a comprehensive ZIP archive containing all evidence files, cryptographic proofs, and blockchain timestamps by clicking "Download zip" — or download individual files using the download icon in the Action column. Store securely on your device or in the cloud.
4
Verify with Trust Verifier
Upload your ProofSnap ZIP evidence package using the upload field, then click "Verify Evidence Package" to automatically check cryptographic integrity, validate digital signatures, and confirm blockchain timestamps. You can also use the Trust Verifier below for independent verification.
The complete workflow at a glance.
What's Inside the Evidence Package
Every capture produces a ZIP archive with 11 files. Here's exactly what you get.
Visual Evidence
screenshot.jpeg
Full-page scrolling capture of the entire webpage
evidence.pdf
Human-readable forensic summary with all metadata
Complete Page Data
page.html
Complete HTML source code of the page
domtextcontent.txt
Extracted visible text content
metadata.json
URL, timestamp, browser info, TLS certificate
Forensic Integrity
forensic_log.json
ISO/IEC 27037 forensic log with tamper-evident hash chain
chain_of_custody.json
Chain of custody with device integrity and NTP time verification
Cryptographic Proof
manifest.json
SHA-256 hashes of every file in the package
manifest.sig
RSA-4096 digital signature of the manifest
publickey.pem
Public key for independent signature verification
Blockchain Timestamp
manifest.json.ots
OpenTimestamps proof anchored to the Bitcoin blockchain
Immutable proof of when the evidence was captured. Cannot be forged or backdated. Independently verifiable by anyone.
Provenance Certificate
provenance_certificate.pdf
Anti-deepfake certificate with 8 integrity checks proving the evidence is an unaltered original
As AI-generated content floods the web, courts increasingly question whether digital evidence is real. The Provenance Certificate proves your capture is authentic — not AI-generated or manipulated. Required under EU AI Act Art. 50 (Aug 2026).
Video of Capture
capture_video.webm
Screen recording included in the evidence package — three modes:
- Auto: records the capture process (~60s) — page scroll, screenshots, metadata extraction.
- Manual: press Start before playing media on the page (live stream, infringer video, deepfake), Stop & Capture when done. Up to 5 min on Essential / Pro, 10 min on Enterprise / Company.
- Session: multi-tab. Records continuously while you browse across multiple tabs, then bundles a per-tab forensic package for every visited tab — full-page screenshot, HTML, DOM, DNS, WHOIS, TLS, signed evidence.pdf — into one signed ZIP. See Session Capture →
All three modes hash the recorded video into the signed manifest — any single-frame change breaks the signature. Available on all plans.
EU Court-Ready Timestamp
manifest.json.tsr
EU qualified timestamp (RFC 3161, eIDAS Art. 41) — admissible in all 27 EU member states.
See exactly what a court receives
Download Sample Evidence PackageSee for yourself — open the ZIP, check the PDF, verify the hash. Or send a URL to support@getproofsnap.com and we'll capture it for you free.
NEW
Session Capture — Multi-Tab Forensics
Document an entire browsing session as a single evidence package. When the story spans more than one page — multi-platform fraud, employment claims, IP theft across domains — capture every visited tab in one ZIP, each with its own forensic bundle.
1
Start session recording
Pick Session mode in the side panel, click Start. Choose "window" or "screen" in Chrome's share prompt to record across tabs.
2
Browse naturally
Open new tabs, navigate, switch between sites. Every visited http(s) tab is automatically tracked and queued for forensic capture — no extra clicks.
3
Stop & Capture
One click bundles the session-wide video plus a complete per-tab evidence folder for every visited tab into one signed, blockchain-timestamped ZIP.
Inside the ZIP — per-tab forensic bundle
Every visited tab gets its own folder tabs/<slug>/ with a complete forensic package, plus session-wide files at root.
Per-tab files (each visited tab)
- Full-page screenshot
- Complete HTML source & extracted DOM text
- DNS cross-verification (Google + Cloudflare DoH)
- WHOIS lookup & TLS information
- Per-tab chain-of-custody (ISO/IEC 27037)
- Signed per-tab
evidence.pdf
Session-wide (root)
- Continuous video across all tabs (
capture_video.webm) - SHA-256 manifest covering every per-tab file
- RSA-4096 signature & public key
- Bitcoin blockchain timestamp (OpenTimestamps)
- Forensic log with tamper-evident hash chain
- EU eIDAS qualified timestamp (Enterprise / Company)
Compliance audits
Document a regulator's portal flow across login, dashboard, and disclosure pages.
Fraud investigation
Capture how a phishing landing redirects through several domains in one signed package.
IP enforcement
Show the same infringing image hosted across multiple sites with timestamped chain of custody.
Multi-platform journalism
Preserve a content-removal cascade across Twitter, Facebook, and the original publisher in one walkthrough.
Independent legal opinion · 21 April 2026
Law firm confirms: ProofSnap is usable as evidence in court
The opinion was prepared by SEDLAKOVA LEGAL s.r.o. (Brno, Czech Bar Association, Company ID 05669871) under EU law (Regulation 910/2014, eIDAS) with reference to Czech civil procedure. Cross-references to the US Federal Rules of Evidence (FRE 901, 902(13)–(14), proposed FRE 707) and the English Civil Procedure Rules (CPR 32, 35) added by the ProofSnap team for orientation of common-law readers.
FRE 901 · FRE 902(13)–(14) · CPR 32 · eIDAS Art. 41
Admissible across proceeding types
ProofSnap outputs are usable as means of evidence in civil, criminal and administrative proceedings. Authentication satisfied under FRE 901 / 902 in the US, CPR 32 in the UK, and free evaluation of evidence in EU systems — reinforced by US case law (Vayner, Lorraine v. Markel, Mendones).
Notarial deed · Court reporter affidavit
Cost-effective alternative to notary
The opinion describes ProofSnap as "a suitable and economical alternative" to notarial fact certification of website state. Court-reporter affidavits and notarial deeds (US $200–500, UK £200–800) require waiting time during which content can disappear; ProofSnap captures immediately with cryptographic integrity.
eIDAS Art. 41(2) · Regulation (EU) 910/2014
Statutory presumption of accuracy
The qualified eIDAS timestamp issued by Disig a.s. (Slovak QTSP, EU Trusted List) carries the statutory presumption of accuracy of date, time and data integrity — shifting the burden of disproof to the opposing party, directly across all 27 EU Member States.
“The outputs of the ProofSnap service are, from the perspective of Czech procedural law and the EU legal framework, generally usable as means of evidence in any type of proceedings.”
— Conclusion of the legal opinion, SEDLAKOVA LEGAL s.r.o., 21 April 2026
The opinion is publicly accessible, no registration. The conclusions express the legal view of the author and do not constitute binding legal advice.
The burden of proof — reversed
ProofSnap's eIDAS qualified timestamps shift the legal burden. Under EU Regulation 910/2014, Article 42, your evidence is legally presumed accurate — the opposing party must prove otherwise.
With ProofSnap eIDAS timestamp
- Opponent must prove your evidence is fake
- Legal presumption of accuracy (eIDAS Art. 42)
- Automatically recognized in all 27 EU member states
- No expert witness needed to explain the technology
- Dual timestamp: eIDAS qualified + Bitcoin blockchain
Regular screenshot or blockchain-only
- You must prove your evidence is real
- No legal presumption — judge decides case by case
- Court recognition varies by country
- May need expert witness to explain blockchain
- Deepfake objection can invalidate entire evidence
eIDAS qualified timestamps issued by Disig a.s. — accredited EU Qualified Trust Service Provider under Regulation (EU) No 910/2014. Verify on EU Trusted List.
Essential (Annual)
$8.99
per month
Monthly Snapshots: 100
- 7-day free trial included
- Export individual files
- Export ZIP archive
- Legal-grade metadata (timestamp, hash, source)
- 5-min video proof (Auto + Manual + Session)
- Provenance CertificateProves your evidence is an unaltered original — not AI-generated or manipulated. 8 integrity checks including deepfake indicators. Courts increasingly reject unverified digital content. Required under EU AI Act Art. 50 (Aug 2026).
- File Certification — 5/moCertify any file with SHA-256 hash, RSA-4096 signature, and blockchain timestamp. The file never leaves your device — only the 32-byte hash is sent to timestamp servers.
- Blockchain (OpenTimestamps)Your evidence hash is anchored to the Bitcoin blockchain — proving it existed at capture time. Decentralized, immutable, and independently verifiable by anyone.
- EU Court-Ready Timestamp (eIDAS)Legally presumed accurate in all 27 EU member states. Issued by a Qualified Trust Service Provider under eIDAS Regulation, Art. 41. Admissible in any European court.
Regular use, archiving
Most Popular
Professional (Annual)
$16.99
per month
Monthly Snapshots: 200
- 7-day free trial included
- Export individual files
- Export ZIP archive
- Legal-grade metadata (timestamp, hash, source)
- 5-min video proof (Auto + Manual + Session)
- Provenance CertificateProves your evidence is an unaltered original — not AI-generated or manipulated. 8 integrity checks including deepfake indicators. Courts increasingly reject unverified digital content. Required under EU AI Act Art. 50 (Aug 2026).
- Blockchain (OpenTimestamps)Your evidence hash is anchored to the Bitcoin blockchain — proving it existed at capture time. Decentralized, immutable, and independently verifiable by anyone.
- File Certification — 15/moCertify any file with SHA-256 hash, RSA-4096 signature, and blockchain timestamp. The file never leaves your device — only the 32-byte hash is sent to timestamp servers.
- EU Court-Ready Timestamp (eIDAS)Legally presumed accurate in all 27 EU member states. Issued by a Qualified Trust Service Provider under eIDAS Regulation, Art. 41. Admissible in any European court.
Blockchain timestamping, audit-grade documentation
Enterprise (Annual)
$28.99
per month
Monthly Snapshots: Unlimited
- 7-day free trial included
- Export individual files
- Export ZIP archive
- Legal-grade metadata (timestamp, hash, source)
- 10-min video proof (Auto + Manual + Session)
- Provenance CertificateProves your evidence is an unaltered original — not AI-generated or manipulated. 8 integrity checks including deepfake indicators. Courts increasingly reject unverified digital content. Required under EU AI Act Art. 50 (Aug 2026).
- File Certification — 50/moCertify any file with SHA-256 hash, RSA-4096 signature, and blockchain timestamp. The file never leaves your device — only the 32-byte hash is sent to timestamp servers.
- Blockchain (OpenTimestamps)Your evidence hash is anchored to the Bitcoin blockchain — proving it existed at capture time. Decentralized, immutable, and independently verifiable by anyone.
- EU Court-Ready Timestamp — 10/mo (eIDAS)Legally presumed accurate in all 27 EU member states. Issued by a Qualified Trust Service Provider under eIDAS Regulation, Art. 41. Admissible in any European court.
1 stamp during trial
High-volume teams, compliance-driven workflows
Company Plans
Flexible team licensing for organizations. Unlimited snapshots for all team members.
Best Value
Annual
$190
/license/year
Minimum 2 licenses
- 7-day free trial included
- Unlimited snapshots per user
- Team management dashboard
- Admin controls & user management
- Priority support
- 10-min video proof (Auto + Manual + Session)
- Provenance CertificateProves your evidence is an unaltered original — not AI-generated or manipulated. 8 integrity checks including deepfake indicators. Courts increasingly reject unverified digital content. Required under EU AI Act Art. 50 (Aug 2026).
- Blockchain (OpenTimestamps)Your evidence hash is anchored to the Bitcoin blockchain — proving it existed at capture time. Decentralized, immutable, and independently verifiable by anyone.
- File Certification — UnlimitedCertify any file with SHA-256 hash, RSA-4096 signature, and blockchain timestamp. The file never leaves your device — only the 32-byte hash is sent to timestamp servers.
- EU Court-Ready Timestamp — 5/mo (eIDAS)Legally presumed accurate in all 27 EU member states. Issued by a Qualified Trust Service Provider under eIDAS Regulation, Art. 41. Admissible in any European court.
1 stamp during trial
Perfect for legal teams, compliance departments, and enterprises
Monthly
$18.99
/license/month
Minimum 2 licenses
- 7-day free trial included
- Unlimited snapshots per user
- Team management dashboard
- Admin controls & user management
- Priority support
- 10-min video proof (Auto + Manual + Session)
- Provenance CertificateProves your evidence is an unaltered original — not AI-generated or manipulated. 8 integrity checks including deepfake indicators. Courts increasingly reject unverified digital content. Required under EU AI Act Art. 50 (Aug 2026).
- Blockchain (OpenTimestamps)Your evidence hash is anchored to the Bitcoin blockchain — proving it existed at capture time. Decentralized, immutable, and independently verifiable by anyone.
- File Certification — UnlimitedCertify any file with SHA-256 hash, RSA-4096 signature, and blockchain timestamp. The file never leaves your device — only the 32-byte hash is sent to timestamp servers.
- EU Court-Ready Timestamp — 5/mo (eIDAS)Legally presumed accurate in all 27 EU member states. Issued by a Qualified Trust Service Provider under eIDAS Regulation, Art. 41. Admissible in any European court.
1 stamp during trial
Flexible monthly billing for teams
Just need a few captures?
One-time purchase. No subscription. Credits never expire.
$4.99
10 captures
All features included: export, metadata, 5-min video proof in Auto, Manual, or Session mode, Provenance Certificate, blockchain timestamp.
Purchase in the app after sign-up.
Court-grade EU timestamps, pay-per-use
For lawyers, GDPR DPOs, and compliance teams who need a qualified eIDAS timestamp for one-off filings, contracts, or hearings — without committing to a subscription.
Issued by Disig a.s. · EU Qualified Trust Service Provider · Recognized in all 27 EU member states under eIDAS Article 41
From $5.00 / stamp · Credits valid 12 months
1 stamp
$6.99
$6.99 / stamp
Best Value
5 stamps
$24.99
$5.00 / stamp · save 28%
10 stamps
$49.99
$5.00 / stamp · save 28%
Same evidence package as our $4.99 SnapPack — screenshot, video proof in Auto, Manual, or Session mode, metadata, DOM text, page HTML, Provenance Certificate, blockchain timestamp — upgraded with a qualified eIDAS timestamp.
No commitment, no auto-renewal. A traditional notary timestamp typically costs €60–300 per document.
Start free 7-day trial · 1 free eIDAS stamp included
New here? Try a qualified timestamp during your trial before buying a pack.
Long-form video evidence, with audio
For court-grade recordings of livestreams, video calls, and multi-step transactions. Each credit unlocks a 30-minute recording with audio and a qualified eIDAS timestamp.
Audio captured at Opus 64 kbps · qualified timestamp issued by Disig a.s. · self-documenting evidence package (15 files including chain of custody, signed manifest, blockchain timestamp)
From $16.99 / video · Credits valid 12 months
1 video
$24.99
$24.99 / video
Best Value
3 videos
$59.99
$19.99 / video · save 20%
10 videos
$169.99
$16.99 / video · save 32%
Each Video SnapPack also includes bundled regular captures + eIDAS stamps at 1:1 ratio — buy 3 videos, get 3 regular captures and 3 eIDAS stamps to use without longform recording.
No commitment, no auto-renewal. Audio capture works on Chrome Tab share across all desktop platforms.
Install ProofSnap · Buy Video SnapPack in extension
Purchase happens in-extension after sign-up. 7-day free trial available.
Evidence disappears. Messages get deleted. Pages go offline. Every day you wait is a day your evidence is at risk.
Start Free 7-Day Trial
4.5/5
on Chrome Web Store
Who Uses ProofSnap and Why
Lawyers, Auditors & Compliance
Document evidence for legal proceedings and regulatory compliance
- Timestamped snapshots for dispute resolution
- Audit-ready exports for regulatory filings
- Cryptographic hash for integrity
- Contract, Employment disputes
"Screenshots aren't enough in court. ProofSnap gives us the structure, timestamp, and traceability we need."
Journalists & Digital Investigators
Preserve online evidence for investigative reporting and OSINT research
- Capture controversial posts or deleted pages
- Export as PDF or ZIP for transparency
- Embed source URL, timestamp, browser context
- Digital forensics, website changes, online harassment
"ProofSnap lets us document the truth before it's edited, censored, or erased."
Freelancers & Developers
Snapshot staging sites, track deployments, and share verified proof with clients
- Save snapshots of staging or live releases
- Include DOM for frontend debugging
- Share ZIPs with clients or QA
- Timestamped proof for verification
- Web archiving, version control, data collection
"It's like Git for the browser — I can prove exactly what the site looked like when I shipped it."
SEO Managers
Track and document SEO changes with timestamped web page snapshots
- Save snapshots of live pages before and after SEO optimization
- Archive DOM structure to verify technical SEO elements (meta tags, schema, canonical links)
- Timestamp page states for Google indexing disputes or client reporting
- Share ZIPs with stakeholders to validate crawlability and content visibility
- Collect audit-ready evidence for algorithm updates, ranking drops, or compliance checks
"It's like Ahrefs for visual evidence — I can timestamp exactly what the site looked like when it launched, down to the DOM."
HR Managers, Recruiters, Visa Officers, Talent Ops
Verify candidates, archive onboarding flows, and document employment records
- LinkedIn profile snapshots for candidate verification, post validation, and prevention of profile falsification
- Timestamped proof for employment validation and visa processing
- Archive candidate documents for compliance and audit
- Save snapshots of onboarding portals and signed contracts
- HR archiving, onboarding version control, and data integrity
"It gives us a timestamped snapshot of the entire onboarding flow — perfect for audits, visa processing, or internal reviews."
Insurance Agents, Claims Adjusters, Underwriters
Capture claims evidence, archive policies, and build audit-ready documentation
- Timestamped proof for claims validation and incident reporting
- Archive policyholder documents for compliance and audit readiness
- Save snapshots of onboarding portals, signed policies, and payout approvals
- Share ZIP bundles with legal, underwriting, or reinsurance teams
"It gives us a timestamped snapshot of the entire claims and policy onboarding flow — ideal for validation, audit readiness, and reinsurance coordination."
Anyone Who Needs Trusted Snapshots
Save pricing pages, receipts, agreements, or any web content you may need later
- Save pricing pages, policies, receipts
- Archive agreements or service terms
- Use for personal records or disputes
- Online casino bonus terms, payout disputes, gambling chargebacks
- Exportable, portable, legally meaningful
"I don't just save what I see — I save what it means."
Resources & Insights
Practical guides on digital evidence, compliance, and online verification.
NEW 2026
Deepfake Defense
How Evidence Survives Deepfake Objections Under FRE 707
Provenance Certificate with 8 integrity checks. Case law: Mendones v. Cushman (2025). FRE 707, Louisiana Act 250, EU AI Act Art. 50.
8 min read
Read article
NEW 2026
Evidence Authentication
How to Authenticate Web Evidence That Survives Cross‑Examination
Screenshots fail under FRE 901. SHA-256 hashes, blockchain timestamps, ISO 27037 chain of custody, and open-source verification survive. Case law, Page Vault comparison.
7 min read
Read article
NEW 2026
Divorce & Custody
Divorce & Custody: How to Capture Social Media Evidence for Court
81% of divorce attorneys report a surge in social media evidence (AAML). Capture Facebook, Instagram, WhatsApp, dating apps before they disappear. CA, TX, FL, NY state rules. FRE 901, eIDAS 2.
14 min read
Read article
NEW 2026
Cyberbullying
Cyberbullying Evidence: How to Document It for Police & Court
46% of teens cyberbullied. Messages get deleted, accounts vanish. 5-step guide to capturing evidence police and courts accept. WhatsApp, Instagram, Discord, TikTok. UK, US, AU, CA, NZ, EU laws.
12 min read
Read article
NEW 2026
Brand Protection
Brand Protection for E-Commerce: Amazon, Temu & Global Marketplaces
$467B counterfeit trade. Document Buy Box hijacking, fake reviews & counterfeits. US Lanham Act, EU DSA, eIDAS 2, FRE 901. Case law & evidence playbook.
35 min read
Read article
NEW 2026
OSINT
OSINT 101: Preserve Social Media Evidence Before It’s Deleted
X, LinkedIn, Telegram & 6 more platforms. FRE 901 authentication, blockchain timestamps, GDPR, deepfake challenges, 15 FAQ. OSINT guide.
40 min read
Read article
Quick Answers
What is ProofSnap?
ProofSnap is a Chrome extension that captures web pages as legally admissible digital evidence with blockchain timestamping, SHA-256 cryptographic hashing, and RSA-4096 digital signatures. It creates tamper-proof evidence packages containing screenshots, metadata, HTML content, and cryptographic proofs that can be independently verified. ProofSnap is used by lawyers, investigators, compliance teams, and individuals to preserve web content before it's deleted or modified, with evidence suitable for court proceedings, regulatory audits, and legal disputes.
Are screenshots admissible as evidence in court?
Plain screenshots alone are generally insufficient as court evidence because they can be easily manipulated and lack proof of when they were taken. Under FRE 901/902 (US Federal Rules of Evidence) and eIDAS 2 (EU), digital evidence must be authenticated to be admissible. To make screenshots court-admissible, they need a cryptographic chain of custody: a SHA-256 hash proving content integrity, a digital signature proving authenticity, and a blockchain timestamp proving the exact capture time. ProofSnap automatically creates all three cryptographic proofs for every web page capture, making your screenshots significantly more defensible in legal proceedings.
How to preserve a web page as evidence?
To preserve a web page as legally admissible evidence: 1) Install ProofSnap Chrome extension, 2) Navigate to the web page you need to capture, 3) Click "Capture page snapshot" to create a forensic evidence package. ProofSnap automatically captures the full-page screenshot, complete HTML source, extracted text content, metadata (URL, timestamp, browser info, TLS certificate), and session data. Everything is bundled into a tamper-evident ZIP archive with SHA-256 cryptographic hashes, an RSA-4096 digital signature, and a Bitcoin blockchain timestamp via OpenTimestamps. This creates a verifiable chain of custody that proves the content existed at a specific point in time and has not been altered.
Comparison: Normal Screenshot vs. ProofSnap Evidence Package
| Feature | Normal Screenshot | ProofSnap Evidence Package |
|---|---|---|
| Evidentiary Value | Low — no proof of when or how captured | High — cryptographic chain of custody |
| Tamper Protection | None — easily manipulated | SHA-256 hash for every file |
| Timestamp Proof | None — file timestamps can be altered | Bitcoin blockchain timestamp (OpenTimestamps) |
| Authenticity Proof | None | RSA-4096 digital signature |
| Metadata | Only EXIF data (limited) | URL, browser, TLS certificate, cookies, timestamp |
| HTML Source Code | Not included | Complete HTML + DOM text |
| Independent Verification | Not possible | Anytime via Trust Verifier or manually |
| Provenance Certificate | Not available — no way to prove content is real | Anti-deepfake certificate with 8 integrity checks (EU AI Act Art. 50) |
| Video of Capture Process | Not available | Screen recording proving no manipulation during capture |
| EU Court-Ready Timestamp (eIDAS) | Not available | Qualified timestamp — legally presumed accurate in 27 EU states |
| Chain of Custody | Not present | Fully documented and cryptographically secured |
How do I preserve cyberbullying evidence for a police report?
46% of US teens experience cyberbullying (Pew Research 2022), and evidence is deleted within minutes. To document cyberbullying for police or court: (1) do not alert the bully, (2) open the platform in Chrome, (3) capture every message, post, and profile with a forensic tool. In the US, cyberbullying can constitute criminal harassment or cyberstalking (18 U.S.C. § 2261A). The UK's Online Safety Act 2023, Australia's Online Safety Act 2021, NZ's Harmful Digital Communications Act 2015, and the EU's Digital Services Act all require authenticated evidence. ProofSnap captures the complete web page with SHA-256 hash, digital signature, and blockchain timestamp — creating a forensic evidence package for law enforcement, court proceedings, or school reports. Read the full cyberbullying evidence guide →
How do I capture social media evidence for divorce or custody court?
81% of divorce attorneys report a surge in social media evidence in family law cases (AAML). Facebook posts, Instagram stories, and WhatsApp messages can prove hidden assets, lifestyle inconsistencies, or parenting concerns — but screenshots alone are easily challenged. Under FRE 901 in the US, California Evidence Code §1400, Texas Family Evidence Rule 901, and Florida Statute §90.901, digital evidence must be authenticated and unaltered. ProofSnap captures the full web page with SHA-256 hash, RSA-4096 digital signature, and Bitcoin blockchain timestamp — creating a forensic evidence package that meets court standards for divorce proceedings, custody modifications, and spousal support disputes. Read the full divorce evidence guide →
Are WhatsApp messages admissible as evidence in court?
WhatsApp messages can be admissible as evidence in court, but authentication is critical. Under FRE 901(b)(1) in the US and similar rules internationally, digital evidence must be authenticated — meaning you must prove the messages are genuine and unaltered. The challenge: it's difficult to prove who actually sent a message, and chat logs can be manipulated or fabricated. ProofSnap solves these problems by capturing the entire chat history with a full-page screenshot, HTML source code, and metadata, then securing it with a SHA-256 hash, RSA-4096 signature, and Bitcoin blockchain timestamp. Particularly relevant for: employment disputes (wrongful termination communications), family law (divorce proceedings, custody disputes), landlord-tenant disputes, and contract disagreements.
How do I get a chargeback from Temu, Shein, or AliExpress?
A chargeback (credit card dispute) against Temu, Shein, or AliExpress requires forensic evidence within the 120-day dispute window. Under Visa Reason Code 13.3 (merchandise not as described) and Mastercard Reason Code 4853, you must prove the delivered item differs from the product listing. Document with ProofSnap: the original product page with price and description, the order history, the payment confirmation, and all communication with the seller — each with a blockchain timestamp. Your bank will request supporting evidence: ProofSnap provides tamper-proof, timestamped evidence packages that, according to industry reports, significantly improve chargeback success rates.
Frequently Asked Questions
ProofSnap is a Chrome extension that captures web pages as legal evidence with blockchain timestamping, ensuring the authenticity and integrity of digital evidence.
ProofSnap uses OpenTimestamps to anchor a SHA-256 hash of your evidence to the Bitcoin blockchain, creating a cryptographic proof of when the capture was made. This timestamp is independently verifiable and cannot be backdated or tampered with, providing irrefutable proof that your evidence existed at a specific point in time.
ProofSnap includes a 7-day free trial with all plans. Choose from flexible monthly or annual subscriptions: Essential ($8.99/month or $80/year), Professional ($16.99/month or $160/year), or Enterprise ($28.99/month or $280/year). Annual plans save 20%.
- screenshot.jpeg: Image file capturing a visual snapshot of the web page.
- metadata.json: Contains contextual details about the evidence, such as timestamp, URL, and browser information.
- manifest.json: Lists all evidence files and their hashes to verify the integrity of the package.
- manifest.sig: Digital signature for the manifest file, ensuring authenticity and integrity.
- manifest.json.ots: OpenTimestamps proof file for the manifest.json.
- publickey.pem: Public key used to verify the digital signature of the manifest.
- evidence.pdf: PDF document compiling all evidence files for easy sharing and review.
- domtextcontent.txt: Plain text content extracted from the web page's DOM.
- forensic_log.json: ISO/IEC 27037 forensic log with tamper-evident hash chain recording every capture operation.
- chain_of_custody.json: Chain of custody document with device integrity, NTP time verification, and evidence binding.
- page.html: Full HTML content of the captured web page.
ProofSnap generates forensically sound evidence with cryptographic
proofs aligned with eIDAS 2 standards for qualified timestamps and digital signatures. Admissibility depends on jurisdiction and specific legal
requirements. Consult with legal professionals for specific cases.
Regular screenshots can be challenged in court because they lack proof of when they were taken and whether they've been altered. Courts increasingly require authentication under rules like FRE 901/902 (US) or equivalent rules in other jurisdictions.
ProofSnap addresses these challenges by creating a forensic evidence package that includes: a SHA-256 cryptographic hash proving the content hasn't been modified, a digital signature for authenticity, a blockchain timestamp proving when the capture occurred, and full metadata (URL, browser info, TLS certificate). This makes your screenshot significantly more defensible than a plain image file.
ProofSnap enables Airbnb hosts to archive all guest communications as legally admissible evidence. Capture messages, reservations, and agreements for disputes, insurance claims, or guest-caused damages.
With regulations like the Digital Services Act (DSA) and updated tax obligations for short-term rental providers, hosts have increasing requirements to maintain records of reservations and communications.
ProofSnap creates a verifiable archive with blockchain timestamp proving communication content at a specific time — ideal for:
- Property condition disputes before/after stays
- Insurance claims and guest-caused damages
- Guest complaints and refund requests
- Documenting contractual terms and agreements
ProofSnap uses three layers of cryptographic protection:
- SHA-256 Hashing: Every file in the evidence package is hashed. Changing even a single pixel or character produces a completely different hash, making any tampering immediately detectable.
- Digital Signature: The manifest (listing all files and their hashes) is digitally signed with a private key. The corresponding public key is included for anyone to verify authenticity.
- Blockchain Timestamp: The manifest hash is anchored to the Bitcoin blockchain via OpenTimestamps, creating an immutable record of when the evidence was captured. This timestamp cannot be forged or backdated.
Together, these mechanisms create a chain of integrity that proves the evidence is authentic, unaltered, and was captured at a specific point in time.
The eIDAS 2 regulation (EU 2024/1183) is fully rolling out by the end of 2026, establishing stricter standards for electronic identification, digital signatures, and qualified electronic timestamps across all EU member states.
Under Article 41, qualified electronic timestamps enjoy a legal presumption of accuracy for the date and time they indicate, and the integrity of the data to which the timestamp is linked. This means evidence timestamped with a qualified service is admissible across all EU courts.
ProofSnap's cryptographic proofs align with eIDAS 2 requirements: SHA-256 hashing for data integrity, RSA-4096 digital signatures for authenticity, and blockchain timestamps via OpenTimestamps for independent time verification. This makes ProofSnap evidence packages suitable for legal proceedings in any EU jurisdiction.
Unlike enterprise-only tools like Page Vault, PageFreezer, or WebPreserver, ProofSnap is a self-service Chrome extension that anyone can install and use immediately. Key differences:
- Instant access: Install from the Chrome Web Store and start capturing in seconds — no sales calls, setup, or enterprise contracts required
- Blockchain timestamping: ProofSnap anchors evidence to the Bitcoin blockchain via OpenTimestamps, providing an immutable, publicly verifiable timestamp that doesn't depend on any single vendor
- Platform-optimized capture: Built-in support for WhatsApp, Slack, Discord, Telegram, LinkedIn, Airbnb, and other dynamic platforms with full-page scroll capture
- Affordable pricing: Plans start at $8.99/month with a 7-day free trial — a fraction of enterprise tool costs
- Complete evidence package: Every capture includes 11 files — screenshot, HTML, extracted text, metadata, forensic log, chain of custody, cryptographic hashes, digital signature, blockchain timestamp proof, and a PDF summary
WhatsApp messages can be admissible as evidence in court, but authentication is critical. Under FRE 901(b)(1) in the US and similar rules internationally, digital evidence must be authenticated — meaning you must prove the messages are genuine and unaltered.
ProofSnap captures the entire WhatsApp Web chat history with a full-page screenshot, HTML source code, and metadata, then secures it with a SHA-256 hash, RSA-4096 digital signature, and Bitcoin blockchain timestamp. This creates a forensic evidence package that is significantly more defensible than simple screenshots. Particularly relevant for: employment disputes (wrongful termination communications), family law (divorce, custody), landlord-tenant disputes, and contract disagreements.
A chargeback (credit card dispute) against Temu, Shein, or AliExpress requires forensic evidence within the 120-day dispute window. Under Visa Reason Code 13.3 (merchandise not as described) and Mastercard Reason Code 4853, you must prove the delivered item differs from the product listing.
Use ProofSnap to document: the original product page with price and description, the order history, the payment confirmation, and all communication with the seller — each capture secured with a blockchain timestamp. Your bank will request supporting evidence: ProofSnap provides tamper-proof, timestamped evidence packages that significantly improve chargeback success rates.
Contact Us
Have questions about ProofSnap or need a business solution? Get in touch with our team.
Or contact us directly at support@getproofsnap.com
Key Terms Explained
Understanding the technology behind tamper-proof digital evidence
Blockchain Timestamping
A cryptographic method that anchors a hash of your evidence to the Bitcoin blockchain, creating an immutable record proving exactly when the content was captured. This timestamp cannot be forged, backdated, or altered, providing court-admissible proof of existence at a specific point in time.
SHA-256 Hash
A cryptographic fingerprint that uniquely identifies file content. SHA-256 (Secure Hash Algorithm 256-bit) generates a 64-character hexadecimal string from any data. Changing even a single pixel or character produces a completely different hash, making any tampering immediately detectable.
Digital Signature
An RSA-4096 cryptographic signature that proves the evidence package was created by ProofSnap and has not been modified. The manifest file is signed with a private key, and anyone can verify authenticity using the included public key (publickey.pem).
Evidence Package
A comprehensive ZIP archive containing all forensic evidence: screenshot, full HTML, extracted text, metadata (URL, timestamp, browser info, TLS certificate), cryptographic hashes in manifest.json, digital signature (manifest.sig), blockchain timestamp proof (.ots file), and a human-readable PDF summary.
OpenTimestamps
An open-source protocol for creating blockchain timestamps. OpenTimestamps aggregates multiple document hashes into a single Bitcoin transaction, making timestamping cost-effective while maintaining full cryptographic security. Timestamps can be independently verified by anyone using the OpenTimestamps.org website or CLI tools.
eIDAS 2 Compliance
The EU regulation (Electronic Identification, Authentication and Trust Services) establishing standards for electronic signatures, timestamps, and digital evidence. ProofSnap's cryptographic proofs align with eIDAS 2 requirements for qualified electronic timestamps, making evidence packages suitable for legal proceedings across EU member states.
Cryptographic Hash
A mathematical algorithm that converts data of any size into a fixed-size string of characters. Used to verify data integrity — if even one bit of the original data changes, the hash will be completely different. ProofSnap uses SHA-256, a 256-bit hash function that produces a unique 64-character hexadecimal fingerprint for every file in the evidence package.
Chain of Custody
The documented chronological history of evidence handling, from collection to presentation in court. For digital evidence, chain of custody includes cryptographic proofs (SHA-256 hashes), timestamps (blockchain anchoring via OpenTimestamps), and digital signatures (RSA-4096) that verify evidence has not been altered since capture. Required under FRE 901/902 (US) and eIDAS 2 (EU) for evidence admissibility.