For civil-litigation attorneys · US · EU · UK
Your client's screenshots won't survive court. Yours will.
In short: ProofSnap is a Chrome/Edge browser extension that captures live web pages, social media posts, marketplace listings, and behind-login dashboards as FRE 902(13)/(14) self-authenticating ZIPs. Each ZIP carries a SHA-256 manifest, RSA-4096 signature, Bitcoin OpenTimestamps anchor, and (optionally) an eIDAS qualified timestamp under EU Regulation 910/2014. Used by plaintiffs' attorneys and defense counsel in defamation, IP, employment, family law, NCII, breach of contract, and regulatory matters. Company Plan $18.99/seat/month (min 2 seats). 7-day free trial.
A browser extension for your firm and your clients. Every ZIP carries SHA-256, RSA-4096, and Bitcoin OpenTimestamps — the authentication foundation Rossbach-style fabrication challenges can't tear apart.
For your firm
- ✓Partners, associates, paralegals capture during intake & discovery
- ✓Admissible under FRE 902(13)/(14) with your Rule 902(11) certification
- ✓Firm-wide Company Plan $18.99/seat/month, min 2 seats
For your clients
- ✓Client buys SnapPack $4.99, captures 10 items, emails you the ZIPs
- ✓Evidence arrives before the retainer is signed or content is taken down
- ✓Same forensic ZIP structure as firm-captured evidence
What ProofSnap is — and what it is not
ProofSnap is a digital evidence preservation tool. It captures the cryptographic foundation that supports FRE 901/902 authentication. It is not legal advice, a notary act, or a guarantee of admissibility. Admissibility is decided by the court on a case-by-case basis — ProofSnap strengthens your technical foundation; the attorney still authors the Rule 902(11) certification and any motions. We do not represent clients, give legal advice, or replace expert witnesses.
What unauthenticated evidence costs you
Four ways phone screenshots end careers and cases.
Authentication challenges used to be a niche concern. Post-Rossbach, opposing counsel knows the playbook. Here is what is on the table when your evidence cannot stand on its own.
Case-dispositive sanction
Rossbach v. Montefiore (2d Cir. 2023): plaintiff's claim dismissed for fabricated iMessage screenshots after device-metadata forensic analysis. Rule 11(c) and Rule 37(e) sanctions exposure on counsel.
ProofSnap effect: any post-hoc edit breaks the SHA-256 manifest, invalidates the RSA-4096 signature, and orphans the OpenTimestamps anchor — Rossbach-style metadata-inconsistency analysis has nothing to find.
Malpractice exposure
Carriers (ALPS, CNA, Lawyers Mutual, CAMICO) increasingly ask about digital evidence handling on renewals. A failed authentication that costs a case becomes the predicate for a malpractice claim from the client.
ProofSnap effect: self-authenticating evidence under FRE 902(13)/(14) is a defensible standard of care — documented, repeatable, verifiable by any expert.
Expert-witness fees you didn't budget
When a screenshot's authenticity is challenged, the cure is a forensic examiner: typical engagement $5,000–$15,000 per matter, longer if device imaging is required. Many contingency-fee cases cannot absorb that mid-litigation.
ProofSnap effect: the ZIP carries the expert's starting foundation. Either the examiner shortens the engagement, or the challenge never makes it past the meet-and-confer.
Lost settlement leverage
Self-authenticating evidence accelerates settlement — opposing counsel who can't credibly challenge your captures stops trying. Discovery shortens. Motion practice shortens. Cases settle on the strength of the record, not the cost of litigating around it.
ProofSnap effect: defendants' motion-to-strike economics flip when every capture carries SHA-256 + Bitcoin OpenTimestamps + (optional) eIDAS. The strongest record settles fastest.
The ZIP your firm produces
14-file forensic evidence package.
Designed to support authentication under FRE 902(13) (certified records generated by an electronic process or system) and 902(14) (certified data copied from an electronic device), both effective December 1, 2017, with a hash + signature + blockchain-anchor triple you or opposing counsel can verify independently at opentimestamps.org.
screenshot.jpeg Visual capture of the pagecapture_video.webm Screen recording of capturepage.html Full HTML contentdomtextcontent.txt Extracted DOM textmetadata.json Timestamp, URL, browser, TLSevidence.pdf Compiled evidence reportprovenance_certificate.pdf Content credentials / capture integritymanifest.json File listing + SHA-256 hashesmanifest.sig RSA-4096 digital signaturemanifest.json.ots OpenTimestamps Bitcoin anchorpublickey.pem Public key (verify signature)forensic_log.json ISO/IEC 27037 capture logchain_of_custody.json Device + NTP verificationmanifest.json.tsr eIDAS qualified RFC 3161 timestamp
Rules 902(13) and 902(14) require a written certification from a qualified person. The attorney or qualified custodian prepares and signs that certification under 28 U.S.C. § 1746; ProofSnap supplies the underlying technical record to reference. Verifies offline by opposing counsel with only python3 + openssl + ots — no ProofSnap service or account required.
What lawyers capture
From a social media post to a behind-login dashboard.
Any content that lives on the open web or behind your client's login — preserved as one self-contained, offline-verifiable ZIP.
Defamation & libel
Posts, comments, reviews, and republications — before the poster edits or deletes.
Social media evidence →IP & copyright
Copied content, infringing listings, counterfeit catalogs, trademark misuse — with HTTP/TLS metadata.
DMCA & copyright →Employment & harassment
Workplace harassment, retaliation, wrongful termination, Title VII / Title IX matters.
Workplace harassment →Family law & custody
Custody-relevant social media, contradicting statements, evidence of cohabitation or income.
Divorce & custody →NCII & deepfake
VAWA § 6851, DEFIANCE Act, state revenge-porn civil statutes, 48-hour Take It Down Act.
NCII attorney guide →Breach of contract
Changed terms, pricing pages, SLA disclosures, deleted refund policies, vendor representations.
Chargeback evidence →Brand protection
Counterfeit listings, impersonation accounts, marketplace fraud, seller identity at moment of capture.
Brand protection →Compliance & regulatory
GDPR / DSA evidence packs, FTC complaints, consumer-protection filings, regulatory disclosures.
GDPR evidence →Behind-login content
Private groups, DMs, marketplace dashboards, admin views, account-state pages — captured from the authenticated session.
How it works →Key case law for quick reference
The authentication cases your motion will cite.
Cautionary precedent
Rossbach v. Montefiore Med. Ctr., No. 21-2084 (2d Cir. 2023)
What happened. Plaintiff in an employment-discrimination matter produced iMessage screenshots as core evidence of discriminatory communications. Defense moved to compel forensic examination of plaintiff's phone. Examination revealed metadata inconsistencies suggesting the screenshots were fabricated — iOS version artifacts and timestamp anomalies that could not exist on the dates claimed.
Result. District court granted summary judgment to the defendant; Second Circuit affirmed. Plaintiff's case was dispositively over — not on the merits, on the evidence. The opinion has been cited repeatedly since 2023 by defense counsel as authority for compelling forensic examination of any party's phone-screenshot evidence.
Why it matters to you. The defense playbook from Rossbach — demand forensic examination, find the metadata gap, move for sanctions — now travels well beyond employment cases. Family law, defamation, IP, and breach-of-contract counsel are all citing Rossbach-style attacks on phone screenshots filed without forensic provenance.
How ProofSnap closes the attack. Each capture is sealed at the moment of acquisition with a SHA-256 manifest, RSA-4096 signature, and Bitcoin OpenTimestamps anchor. Any post-hoc edit (one byte, one pixel) breaks the hash, invalidates the signature, and orphans the timestamp. The Rossbach-style examination has no internal contradiction to find — the file is either deterministically intact, or visibly broken.
Seven supporting cases your motion will reference
- Lorraine v. Markel Am. Ins. Co., 241 F.R.D. 534 (D. Md. 2007) — Judge Grimm's foundational ESI framework (Rule 901 / 801–807 / 1001–1008 / 403). The ZIP supports the Rule 901 identification prong; remaining prongs are your legal work.
- Griffin v. State, 419 Md. 343 (2011) — social-media printouts alone don't authenticate authorship. ProofSnap captures the full account profile alongside posts, giving you the circumstantial foundation under FRE 901(b)(4).
- Commonwealth v. Mangel, 181 A.3d 1154 (Pa. Super. 2018) — extends Griffin's authorship concern. Same foundation applies; the ZIP's HTTP/TLS metadata can rebut a spoofing defense.
- Commonwealth v. Banas, 5 N.E.3d 3 (Mass. App. Ct. 2014) — Facebook screenshot printout ruled inadmissible without additional circumstantial authentication. Reinforces the Griffin / Mangel pattern.
- United States v. Vayner, 769 F.3d 125 (2d Cir. 2014) — VKontakte page authentication reversed for insufficient circumstantial evidence of ownership. HTTP/TLS handshake metadata in the ZIP rebuts the core Vayner concern.
- Tienda v. State, 358 S.W.3d 633 (Tex. Crim. App. 2012) — MySpace profile authenticated through combination of distinctive content, photos, and corroborating circumstances. ProofSnap captures all three layers in a single ZIP.
- Dendrite Int'l v. Doe No. 3, 775 A.2d 756 (N.J. 2001) — four-step John Doe unmasking test. The ZIP satisfies the posting-authenticated prong; Rule 45 subpoena handles identity.
EU / cross-border matters
eIDAS qualified timestamps for EU courts.
For matters with EU-domiciled parties, foreign platforms, DSA Article 16 takedowns, or GDPR actions, ProofSnap optionally seals each ZIP with an eIDAS qualified timestamp from an EU Qualified Trust Service Provider.
Legal recognition
eIDAS Regulation (EU) 910/2014, Article 41 grants a qualified timestamp a statutory presumption of accuracy across all 27 EU member states — admissible in any European court without additional authentication.
Qualified provider
RFC 3161 timestamps issued by an EU Trusted List Qualified TSP. The full certificate chain and a frozen snapshot of the EU Trusted List are bundled in the ZIP — verification works offline, indefinitely.
Company Plan includes 5 eIDAS qualified timestamps per user/month. Enterprise tier ($28.99/month) includes unlimited eIDAS on every capture — recommended for EU-based firms and US firms with regular cross-border work.
Already evaluating Page Vault, Hanzo, or X1 Social Discovery?
How ProofSnap compares.
All four tools capture web pages with cryptographic integrity. The differences are in price model, deployment friction, behind-login support, blockchain anchoring, and EU eIDAS coverage. Public information, last reviewed May 2026 — verify current details on each vendor's site before purchasing.
| Feature | ProofSnap | Page Vault | Hanzo | X1 Social Discovery |
|---|---|---|---|---|
| Pricing model | $18.99/seat/mo (Company); $4.99 SnapPack (client) | Subscription, contact for quote | Enterprise contract | $2K–$5K+/yr per seat |
| Deployment | Chrome / Edge extension, 30 sec install | Browser-based, account required | Cloud platform, IT setup | Windows desktop install |
| SHA-256 hash + RSA-4096 signature | ✓ Both, every capture | SHA-256 only | SHA-256 only | SHA-256 only |
| Bitcoin OpenTimestamps anchor | ✓ Every capture | — | — | — |
| eIDAS qualified timestamp (EU courts) | ✓ Enterprise tier | — | — | — |
| Behind-login capture (DMs, dashboards) | ✓ Native, user's session | ✓ | ✓ | ✓ |
| Client-side capture (pre-retainer) | ✓ SnapPack $4.99 | — | — | — |
| Offline verification (no vendor required) | ✓ python3 + openssl + ots | Vendor-hosted | Vendor-hosted | Vendor-hosted |
| FRE 902(13)/(14) self-authenticating | ✓ | ✓ (with affidavit) | ✓ (with affidavit) | ✓ (with affidavit) |
| Free trial | 7-day free trial, all plans | Demo only | Demo only | Demo only |
vs. Page Vault
Same browser-extension UX, adds Bitcoin OpenTimestamps + eIDAS + RSA signature, plus client-side SnapPack for pre-retainer capture.
vs. Hanzo
Lower deployment friction (extension, not enterprise contract). Both handle dynamic content; ProofSnap adds blockchain anchoring & per-seat transparent pricing.
vs. X1 Social Discovery
~10× less expensive at small-firm scale. X1 wins on enterprise mass-collection; ProofSnap wins on per-matter capture & cross-platform (Mac/Linux via Chrome/Edge).
Comparison based on each vendor's publicly available marketing materials and reviews on G2 / Capterra / SoftwareWorld as of May 2026. Verify current pricing and feature parity directly with each vendor.
Firm pricing
Start free. Upgrade when you bill for the matter.
7-day free trial on all plans. Billing starts at day 8 unless you cancel — credit card required to start, charged only after the trial period if you don't cancel. Firm overhead, not per-capture billing.
Company Plan
Minimum 2 seats · annual $190/seat (save 17%).
✓ 7-day free trial · cancel by day 7 at zero cost
- Unlimited captures per seat
- Team dashboard + shared audit log
- 5 eIDAS qualified timestamps per user/month (Art. 41 EU presumption)
- FRE 902(13)/(14) self-authenticating ZIPs
- Bitcoin OpenTimestamps anchoring on every capture
- Priority support
Solo attorney · Enterprise single-seat
Annual $280/yr (save 20%).
✓ 7-day free trial · cancel by day 7 at zero cost
- Unlimited captures
- Unlimited eIDAS qualified timestamps on every capture (EU court-ready)
- Bitcoin OpenTimestamps + RSA-4096
- Priority support
- SAML/SCIM SSO available
Credit card required to start · cancel by day 7 at zero cost
See full pricing table for Essential ($8.99/mo) and Professional ($16.99/mo) mid-tiers, or SnapPack $4.99 for client pre-retainer capture.
Attorney FAQ
• FRE 902(13) — certified records generated by an electronic process or system — covers things like server logs, transactional records, and capture-tool outputs.
• FRE 902(14) — certified data copied from an electronic device, storage medium, or file — covers data authenticated by a process of digital identification (typically cryptographic hashing).
Both rules require a Rule 902(11)-style written certification from a qualified person, made under penalty of perjury (28 U.S.C. § 1746). The certification is what bridges the technical capture (the ZIP) and the courtroom (the exhibit). ProofSnap supplies the underlying technical record — SHA-256 manifest, RSA-4096 signature, Bitcoin OpenTimestamps anchor, ISO/IEC 27037 forensic log, chain of custody — that the certification references; the attorney or qualified custodian authors and signs the certification.
• Page Vault — mature browser-based capture, subscription pricing, SHA-256 hashing, no Bitcoin or eIDAS anchoring.
• Hanzo — enterprise-scale dynamic-content archiving with AI-assisted review; long deployment runway.
• X1 Social Discovery — Windows desktop tool for mass enterprise collection; thousands per seat per year; survived past social-platform interface breakages.
• ProofSnap — Chrome/Edge extension at $18.99/seat/month (Company Plan, min 2 seats), adds Bitcoin OpenTimestamps and (Enterprise tier) eIDAS qualified timestamps, plus a $4.99 client-side SnapPack for pre-retainer captures by the client.
Best fit for a 2–25-attorney plaintiffs' firm: ProofSnap. Best fit for a corporate-investigations team handling 100,000+ items per matter: X1 or Hanzo. See the comparison table.
Malpractice / professional liability. ProofSnap typically falls within standard office-technology coverage (ALPS, CNA, Lawyers Mutual, CAMICO standard form policies), analogous to Lexis / Westlaw / Clio usage — not a scheduled third-party vendor requiring separate disclosure. Confirm with your carrier; we are not an insurance broker. Review Model Rule 1.5(a) and ABA Model Rule 1.8(e) on advancing litigation expenses if billing the capture cost to the client.
Next matter is always one call away
Install the Chrome extension now. Use it on your next intake call.
7-day free trial — cancel by day 7 at zero cost. The moment your client describes the first post, you text them the install link and they send you a forensic ZIP before they hang up.
Cancel by day 7 at zero cost · download sample ZIP first · support@getproofsnap.com
Legal disclaimer: This page provides general information for civil-litigation attorneys and is not legal advice. ProofSnap is not a law firm and does not represent clients. Consult a licensed attorney in the relevant jurisdiction before relying on any content. Case-law summaries are abbreviated for context; read the opinions before citing them. Statutes and rules change; verify current text before filing. Admissibility is decided by the court on a case-by-case basis — ProofSnap supports authentication but does not guarantee admission.
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