How to Add Timestamp Online
Step-by-step instructions to add a trusted timestamp to a pdf document with ZiaSign.
Why this workflow matters
ZiaSign's trusted timestamp tool adds a cryptographic timestamp to your PDF, proving the document existed at a specific point in time. Essential for intellectual property, regulatory filings, and legal evidence.
Step by step
Add Timestamp is one of the fastest ways to add a trusted timestamp to a pdf document. Pro access gives you the full workflow.
- 1
Upload your PDF
- 2
Timestamp is applied automatically
- 3
Download the timestamped PDF
Frequently asked questions
What does a timestamp prove?
A cryptographic timestamp proves the document existed at a specific date and time, and hasn't been modified since.
Is a timestamp the same as a digital signature?
No. A timestamp proves when the document existed. A digital signature proves who signed it. Both can be combined for complete evidence.
Who issues the timestamp?
Timestamps are issued by a trusted third-party Time Stamping Authority (TSA) — an independent certifying entity.
Can the timestamp be forged?
No. The timestamp uses cryptographic hashing. Any modification to the document after timestamping invalidates the timestamp.
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Read guideReady to run the actual workflow?
You have the steps. Open the tool, process the file, and then move into the next recommendation if the document still needs cleanup, protection, or conversion.