Validate Timestamp Advanced
Validate the timestamp on a signed PDF. Pro plan required.
How to Validate Timestamp
Upload your signed PDF
Timestamp is verified
View validation results
Common questions
Frequently Asked Questions
What is validated?
The timestamp's cryptographic signature, issuing authority, and whether the document has been modified since timestamping.
What if validation fails?
A failed validation means the document was modified after timestamping, the timestamp is expired, or the issuing authority is not trusted.
Can I validate timestamps from other tools?
Yes. The validator works with timestamps from any RFC 3161 compliant Time Stamping Authority, not just ZiaSign.
Is timestamp validation legally accepted?
Yes. Cryptographic timestamp validation is accepted in courts and regulatory proceedings as proof of document existence and integrity.
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