The Compliance Proof Auditors Need
Pick what you're anchoring, or drop a file. It's fingerprinted in your browser — nothing leaves your device — and you get a receipt anyone can verify.
“Anchor” = a timestamp written to a public record no one can backdate or erase.
We don’t just claim tamper-evidence. We run it at scale, in public, every day.
Official public records — the EU Official Journal, EUR‑Lex, UK legislation, the US Federal Register, SEC EDGAR and more — fingerprinted on our side and anchored continuously.
160+ official sources — anchored every day.
Live document counts, straight from the public record. Hover a row to pause.
The evidence your General Counsel can hand to a regulator.
A self-written log proves nothing to a third party. A LedgerProof dossier is independently verifiable — the difference between “trust us” and “check it yourself.”
Anchor anything — pick a starting point.
An AI output, a document, an agreement, your art, evidence, a log, a dataset — or drop any file in the tool above. Fingerprinted on your device, hash-only.
Free to create and verify. Paid to manage and prove.
Start free with the drop-a-file tool above. When you need to register AI systems, monitor them, and export an auditor-ready dossier — that’s the Vault.
Register & prove
- Register the AI systems you must prove
- Anchored evidence, on the record
- Auditor-ready dossier export
Regulated & scale
- SSO & self-host options
- Certified evidence packages
- Priority support
First receipt in five minutes.
Emit a tamper-evident receipt for any output. Nothing leaves your box but a SHA-256. Verifying is free and keyless.
Read the quickstart →# install $ pip install ledgerproof # emit a receipt — artifact hashed locally, hash-only egress from ledgerproof import LedgerProof lp = LedgerProof(publisher_id="LEI:529900H…", deployer_country="DE") receipt = lp.publish_ai_article_50( artifact="the AI output text…", # hashed on your box ai_system_id="support-bot", content_category="text", ) print(receipt.sequence, receipt.verify_url)