Notarised integrity · Bitcoin-anchored
The 100-Year Vault
Every receipt sealed here is rolled into a daily Merkle root, signed with Ed25519, submitted to public OpenTimestamps calendars, and confirmed in a Bitcoin block. You can verify any document offline — even if Zentru ceases to exist tomorrow.
Daily anchors
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Latest leaves
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Bitcoin-confirmed
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Verify any sealed document
Drop a file. It is hashed in your browser — never uploaded. We look up the matching receipt and verify its Ed25519 signature.
Recent anchors
| Date | Leaves | BTC block | Merkle root |
|---|---|---|---|
| No anchors published yet. | |||
Offline verifier
For paranoid recipients: the receipt payload + signature page in the notary-grade PDF is enough to verify with any Web Crypto, Node, or Python implementation. Procedure: import the embedded JWK, then verify the Ed25519 signature against SHA-256(document). The OpenTimestamps `.ots` proof on each anchor can be independently confirmed against the Bitcoin blockchain with the official `ots verify` CLI.