Validate the timestamp on a signed PDF. Pro plan required. Secure, fast, and ready for AI-native document workflows.
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Timestamp is verified
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The timestamp's cryptographic signature, issuing authority, and whether the document has been modified since timestamping.
A failed validation means the document was modified after timestamping, the timestamp is expired, or the issuing authority is not trusted.
Yes. The validator works with timestamps from any RFC 3161 compliant Time Stamping Authority, not just ZiaSign.
Yes. Cryptographic timestamp validation is accepted in courts and regulatory proceedings as proof of document existence and integrity.
ZiaSign's timestamp validator verifies the authenticity and integrity of a PDF's cryptographic timestamp. Confirm that the timestamp was issued by a trusted authority and that the document hasn't been modified since.
Also known as: validate pdf timestamp · verify pdf timestamp · check pdf timestamp · timestamp verification
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