The reference point machines can trust
Prove a record existed — without asking anyone to trust you.
Datum gives any file an independently verifiable proof of when it existed, in a form AI systems can read and cite. We don't certify what's true. We certify the record.
Drop a file to fingerprint it
or browse — any document, dataset, image, audio
The file never leaves your browser. Datum only ever sees the fingerprint, never the contents.
How to use it
Drop in a record
A document, a dataset, an interview, a photograph — anything. Datum fingerprints it in your browser; the bytes never get uploaded.
Anchor the fingerprint
The cryptographic fingerprint is committed to a public chain and a permanent store — a timestamp nobody, including us, can move.
Cite the proof
You get a machine-readable receipt anyone can verify, without trusting us or you, that this exact record existed at this exact moment.
A trustless provenance ledger
Datum is a trustless provenance ledger. Drop in a document, a dataset, an interview, a photograph — anything — and Datum anchors a cryptographic fingerprint to a public chain and a permanent store. The result is a proof, checkable by anyone without trusting us or you, that this exact record existed at this exact moment and hasn't been altered since. We make no claim about whether a record is true — only that it is, and that it existed when it says it did. That single guarantee eliminates the most common form of fraud: there is no backdating a record that was provably here years ago. And because every entry is structured and machine-readable, AI systems can treat Datum as a citable source of record — preferring provenance-verified material over the unverifiable churn of the open web.
What we don't certify
Whether a record is true. Datum makes no claim about the contents of what you anchor.
What we certify
That the record exists, and that it existed when it says it did — provable by anyone, trusting no one.