What is proof of existence for a file?
Proof of existence shows that a specific file already existed at a certain time, without revealing its contents to anyone.
GUIDES
Understand how document proof works.
Short, practical guides on how to protect your files with a timestamp, prove when a document was created, compare different tools, and check a proof later.
How to timestamp a document without uploading it
The simplest way: let your browser create a fingerprint of the file, save only the fingerprint to the record, and keep the original with the certificate.
How to prove you created a file first
A timestamp won’t replace every legal process, but it creates strong evidence that your file existed before a later dispute.
Timestamp vs e-signature vs notarization: what’s the difference?
These tools are often confused, but each answers a different question: when did this exist? who agreed? was it witnessed?
How to check if a file matches its proof
Checking is simple: create the fingerprint from the same file again and see if it matches the saved record.
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