RFC 3161 application
Free timestamp (public TSAs Sectigo/DigiCert/GlobalSign) or eIDAS-qualified InfoCert; sidecar .tsr token.
Signature
Timestamp
The Timestamp module applies an RFC 3161 timestamp to a file — at a free TSA or an eIDAS-qualified InfoCert one — and verifies an existing timestamp (.tsr) against the original file. Only the SHA-256 hash leaves your device, never the content.
What it does
What the Timestamp module does
Timestamp verification
Checks that the timestamped imprint matches the file's hash, the TSA signature, the eIDAS qualification, the certified date, the serial and the policy.
OCSP revocation
On request it queries the TSA certificate revocation status online.
Only the hash leaves the PC
Only the SHA-256 hash is sent to the TSA, never the file content: full privacy.
Step by step
How it works
- Create: drop a file and choose the free or InfoCert timestamp.
- Verify: provide the original file and the
.tsrand read the full outcome.
FAQ
Frequently asked questions
What does a timestamp prove?
It proves that a file existed, unchanged, at a certain date and time certified by a Timestamping Authority (TSA) — useful to date an expert report or a document in a legally opposable way.
How do I verify a timestamp (.tsr)?
Provide the original file and the
.tsr token: Probatio checks that the timestamped imprint matches the file's hash, the TSA signature, the eIDAS qualification, the certified date and, on request, OCSP revocation.Is my file uploaded online?
No: only the SHA-256 hash is sent to the TSA, never the file content. The token is also verifiable with
openssl ts.
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