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Verify a Signatas document

Supply an evidence bundle and, if you have it, the document you received. Every check runs on the files you supply. Nothing is looked up, and no record of ours is consulted.

Your files are read in memory to answer this one question and then discarded. They are not stored, not logged, and not sent anywhere else.

The files to check

The bundle is the JSON file issued when a ceremony completes. The document is optional — without it, the bytes of the file itself cannot be checked, and the report will say exactly that.

The .evidence.json file issued when the ceremony completed.

The PDF you received. Supplying it lets the verifier compare its bytes against the hash recorded in the chain.

Bundle up to 1.0 MB; document up to 3.0 MB. Larger files must be checked with the offline verifier.

You do not have to trust this page

The same checks run on your own machine with no connection to us: npm run verify:evidence -- bundle.json document.pdf. That is the version that still works if this website does not, and it is the one to rely on in a dispute.