Prove it existed.
Forever.
Drop any file — a contract, a model card, a dataset, a design, an AI decision log. Your device fingerprints it, the fingerprint is written into Bitcoin, and you get a receipt anyone on earth can check against the Bitcoin blockchain. The file never leaves your hands.
How it works
Your browser computes the file's SHA-256. Only those 64 characters travel.
Every few minutes, every fingerprint is folded into one Merkle tree.
The tree's root goes into Bitcoin through the public OpenTimestamps calendars.
Your Forever Proof checks against Bitcoin itself. No account. No trust in us.
Built for AI companies, governance tools and auditors
Anchor your own logs, model releases or evidence packs in Bitcoin through one call. Free — 500 fingerprints a day without a key, 100,000 with one.
curl -X POST https://sebbi.pro/x/notary/stamp \
-H "Content-Type: application/json" \
-d '{"digests": ["'$(sha256sum report.pdf | cut -c1-64)'"], "label": "Q3 model card"}'
Or let an AI assistant do it: connect https://sebbi.pro/mcp and ask it to notarise a file — agents can also read the discovery file below. Show you are anchored with a live badge:
<img src="https://sebbi.pro/n/NT-XXXX-XXXX.svg" alt="Anchored in Bitcoin via sebbi.pro">
Machine-readable: /.well-known/sebbi-notary.json · full spec
Want it all set up for you? Governed in 7 days — £495, live in 7 days or your money back.
Every sebbi.pro decision is already in Bitcoin
Each hour the whole sebbi.pro chain is folded into one root and written into Bitcoin. Any sealed AI decision gets a Forever Proof that outlives us.
Get a Forever Proof