Cryptographic Web Evidence
One click in your browser. A cryptographic proof that the page you're looking at is exactly what the server sent, verified by independent nodes on a decentralized network. No screenshots. No trust required.
The Problem
Courts, regulators, and opposing counsel know that screenshots can be fabricated in seconds. You need proof that's mathematically tamper-proof.
Any browser's DevTools can alter page content before capture. Screenshots prove nothing about what was actually served.
Pages get edited, deleted, or taken down. By the time you need the evidence, it may no longer exist.
File metadata, browser timestamps, and system clocks are all easily manipulated. Proving when content existed is as important as proving what it contained.
Who captured it? Was it altered after capture? Traditional methods leave gaps that opposing counsel will exploit.
We use TLSNotary, a cryptographic protocol that creates a mathematical proof of what a web server returned, when it returned it, and to whom. Proofs are generated by independent nodes on a decentralized network, so no single party (including us) can forge or tamper with the result.
How It Works
Install the Chrome extension. Navigate to any page. Click "Prove This Page." That's it.
Add FirmRecord to Chrome. Create a free account in seconds. No credit card needed.
Go to the web page you need to preserve. Any page served over HTTPS works: social media, legal filings, product listings, terms of service.
FirmRecord captures a screenshot, then runs a TLSNotary proof through independent verifier nodes on a decentralized network. The proof is mathematically bound to the server's TLS session.
Receive a permanent, shareable proof page with the screenshot, verified HTML source, and downloadable cryptographic proof file. Share it with anyone.
Use Cases
When screenshots won't cut it and the stakes are high, FirmRecord delivers proof that holds up.
Preserve evidence of defamation, terms of service violations, IP infringement, or misleading representations before they disappear.
Document that web properties, disclosures, and public statements meet regulatory requirements at specific points in time.
Capture trademark infringement, counterfeit product listings, or unauthorized use of copyrighted material with irrefutable proof.
Verify claims made on websites during M&A, investment diligence, or vendor assessments. Create a permanent record of representations.
Preserve social media posts, forum discussions, or public records for internal investigations, insurance claims, or law enforcement referrals.
Document pre-existing conditions, policy terms, or third-party representations that are relevant to claims disputes.
Features
Everything runs inside your browser. No uploads, no third-party access to your browsing, no complicated setup.
Multi-party computation generates a mathematical proof of what the server sent over TLS. No single party can forge it. Open-source and auditable.
Proofs are generated through independent verifier nodes on the Bittensor network. No single company controls the verification process, not even us.
Every proof includes a cryptographically bound timestamp proving exactly when the content was served. No reliance on system clocks or metadata.
Every proof includes a visual screenshot of the page as you see it, plus the complete verified HTML response from the server, including hidden elements and metadata.
Download the raw cryptographic proof and verified HTML. Proof files are self-contained and can be independently verified at any point in the future using open-source tools.
Every proof gets a permanent, public URL you can share with clients, counsel, or anyone who needs to see the evidence. No account required to view.
Tag each proof with a case or matter number. Keep your evidence organized and searchable. Previous case numbers auto-complete for speed.
The TLSNotary prover runs as WebAssembly inside Chrome. Your browsing data never leaves your machine. We only see the final proof, not your session.
Pricing
Free tier for individual use. Pro for when you need the strongest possible proof.
For individuals who need verified web evidence without any commitment.
Free forever. No credit card required.
For professionals who need maximum evidentiary strength. Each proof is verified by 3 independent nodes.
Per proof. Buy credits in packs. Credits never expire.
Not sure if Pro is worth it? Try it free. Activate inside the extension with one click.
10 pro credits. No credit card required.
Free vs Pro
A single verifier creates a valid cryptographic proof. Three independent verifiers make it virtually impossible to challenge.
A single independent node on the Bittensor network verifies the TLS session and generates a cryptographic proof. This is already stronger than any screenshot, notarized printout, or Wayback Machine capture. Suitable for personal use, research, and lower-stakes documentation.
Three separate nodes, each operated by a different party on the Bittensor network, independently verify the same page. If someone challenges one verifier's integrity, two others corroborate it. This is the standard for litigation, regulatory compliance, and anything where the evidence needs to be bulletproof.
FAQ
Screenshots can be trivially edited using browser developer tools before capture. The Wayback Machine is useful for historical research but does not produce cryptographic proofs and cannot verify server identity. FirmRecord generates a mathematical proof tied to the actual TLS session between your browser and the target server, verified by independent nodes on a decentralized network. The result is independently verifiable and tamper-proof.
FirmRecord proofs are designed to meet the evidentiary standards for digital evidence. The cryptographic proof establishes authenticity and integrity, the timestamp establishes when the content existed, and independent verification addresses chain of custody concerns. Pro proofs with 3 independent verifiers are especially strong, as no single party can be accused of collusion. While admissibility depends on jurisdiction and the specific court, our proofs provide a significantly stronger foundation than screenshots, printouts, or affidavits.
TLSNotary uses a multi-party computation (MPC) protocol to split the TLS session between a prover (running in your browser as WebAssembly) and a verifier (an independent node on the Bittensor network). The prover communicates with the target web server while the verifier participates in the TLS handshake without seeing the actual content. This produces a proof that the server sent specific content over a genuine TLS connection, without requiring any cooperation from the target server. The proof is cryptographically bound to the server's TLS certificate.
Yes. Every proof file can be verified using open-source TLSNotary verification tools without any connection to FirmRecord. This means opposing counsel, a court-appointed expert, or any third party can independently confirm the proof's validity. No trust in FirmRecord is required.
Any web page served over HTTPS. This includes social media posts, forum discussions, product listings, terms of service, regulatory filings, news articles, and more. FirmRecord also sends your cookies with the request, so pages that require login (like your account settings or private social media posts) can be captured too.
Free gives you 10 proofs per month, each verified by 1 independent node. This is already a real cryptographic proof, far stronger than a screenshot. Pro gives you 3 independent verifiers per proof, meaning three separate operators each independently confirm the page content. This triple redundancy makes Pro proofs extremely difficult to challenge in any adversarial context. Pro uses credits (starting at $0.50/proof) that never expire.
Bittensor is a decentralized network where independent operators run verifier nodes. FirmRecord uses Subnet 103 (Djinn) on this network. Each verifier is operated by a different party with their own infrastructure, which means no single entity (including FirmRecord) controls the verification process. This decentralization is what gives the proofs their strength: there is no central authority to compromise or coerce.
Get Started
Install the Chrome extension and create your first proof in under a minute. Free. No credit card. No setup.