Public Register · Free Timestamps · Evidence Register
The Timestamp Register
Register the SHA-256 fingerprint of a file together with a non-qualified timestamp and later prove that the file already existed at a specific point in time. Each entry is assigned a register number in our register and is immutably linked to a timestamp on the Solana blockchain.
- Entries in the Register
- 4
- Latest Entry
- 2026-07-12 16:10
- Stored on
- Solana
How the Register Works
Four steps, from the file to the certificate. The real name is not stored on the blockchain.
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Calculate Hash
Your browser calculates the SHA-256 hash of the file. The file itself is never transmitted.
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Calculate Author Hash
The file hash, real name, and a secret method are used to create the author hash.
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Store on Solana
Both hashes are written to the blockchain as part of a transaction and remain stored there.
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Receive Register Number
The entry is added to our public register, and you receive a PDF certificate.
Recently Registered
Versatile Applications
Proof of Priority
Show that a draft, manuscript, or data set already existed at a particular point in time.
Integrity Protection
A modified file produces a different hash. Any alteration becomes immediately apparent.
Publicly Verifiable
Anyone can verify the entry in the register and on the blockchain.
Strong Data Protection Through a One-Way Hash Function
We never see your file and do not store your real name on the blockchain. Only hashes appear in the register. Anyone wishing to verify the entry will need the real name from you. The real name cannot be recovered from the hash, because it is not possible to calculate the name from the hash value. Nevertheless, when the file hash, author hash, and real name are provided, the real name can be verified.