File timestamping with Bitcoin-anchored proof bundles.
Hashing your file…
Your file is hashed (SHA-256) in the browser. It never leaves your device.
Only the hash is sent to our server, which submits it to OpenTimestamps — anchoring it to Bitcoin's blockchain.
You get a .bitproof bundle with your manifest and proof. We don't store anything.
After ~1-2 hours, the proof is confirmed on Bitcoin. Verify it anywhere — even if BitProof disappears.
- Your file (only the hash touches our server) - Persistent proof records (you keep the bundle) - Database entries tied to your proof Stateless by default.