Timestamp Registry

Public registry · Solana blockchain · free

The Timestamp Registry

Register the fingerprint of a file and prove later that it already existed at a given moment – and that it is yours. Every entry gets a register number and is anchored immutably on the Solana blockchain.

Register a file Search the registry
Entries in the registry
4
Latest entry
2026-07-12 16:10
Anchored on
Solana

How the registry works

Four steps, from file to certificate. The order matters – each step builds on the one before it.

  1. Hash the file

    Your browser computes the SHA-256 hash. The file itself is never transmitted.

  2. Salt the author

    File hash, real name and a pepper produce the salted author hash. We do not store the name.

  3. Anchor on Solana

    Both hashes go onto the blockchain as a memo transaction. The signature is the receipt.

  4. Receive a register number

    The entry enters the public registry and you get a PDF certificate.

Recently registered

See all entries →

PB-2026-000004 File hash 5c95a0bd6a…fa86fae0 Author hash f2379c8147…30d9a498 Registered 2026-07-12 16:10 PB-2026-000003 File hash ec61614f2e…1cde52e2 Author hash 8fa69b5183…6c1f0608 Registered 2026-07-12 16:00 PB-2026-000002 File hash 6ddb0cb796…c7072e99 Author hash 8ffe1a8b34…0931344d Registered 2026-07-12 15:49 PB-2026-000001 File hash cdd1ada860…070237a0 Author hash 2c1fe770a5…751e93d4 Registered 2026-07-12 15:45

What it is for

Proof of priority

Show that a draft, a manuscript or a dataset already existed at a specific point in time.

Integrity

A modified file produces a different hash. Tampering becomes visible immediately.

Publicly checkable

Anyone can follow the entry in the registry and on the blockchain – without having to trust us.

What we do not know

We never see your file and we do not store your real name. The registry holds hashes only. Anyone who wants to verify an entry needs the real name from you – nobody can recover it from the hash.

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