Drop your file here
(or click to browse and select)
Ready to Verify: {{fileName}}


Confirmed: Your chainstamp proof is in the blockchain
Status: Confirmed, {{verifyStatus.confirmations}} Confirmations

Chainstamp ID
Transaction ID

Confirmed in block: {{verifyStatus.blockNumber}}
Timestamp: {{blockTime}} on {{blockDate}}


Pending Blockchain Submission

Status: Pending, 0 Confirmations

Expected submission time in: {{expected}}

Pending Blockchain Submission

We'll send a notification to {{emailToNotify}} when confirmation in the blockchain is done.
This Chainstamp Proof has not been sent as a blockchain transaction yet, check again after the time shown above.

Submitted Transaction

Status: Submitted, 0 Confirmations

Chainstamp ID
Transaction ID

Transaction Submitted to Network

We will send a notification to {{emailToNotify}} when confirmation is done.

Not Found

We couldn’t find a chainstamp matching your file

File Hash

Make sure the original file was not altered since submission.


Backup and Protect your files

In order to verify your chainstamp’s at later date (like 10 years from now), keep a perfect copy of your files.
Caution: programs like Microsoft word will alter your files if you just open them, so keep a separate copy or use .pdf format

Files are not sent to us

This web page processes your files into unique "fingerprints" (digital hashes) without sending their contents to our server.
Only this digital fingerprint is shared with us and can be seen by others.
Submission has free and paid options available.


How to step 2

Select a file

Using the drag drop area above or by clicking on that, you can select a file that you previously submitted for a Chainstamp Proof.

When you are ready click submit button.
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How to step 2


Your files “fingerprint” is computed inside the browser and then that is submitted to us. We will find any matching chainstamp proof in our system.
How to image 1
How to step 3


Once we located your chainstamp proof we will provide the details of its status.

A Chainstamp proof can be in 1 of 3 states:

  • Pending (not submitted as a transaction yet)
  • Submitted (submitted but not confirmed in the Blockchain)
  • Confirmed (Your proof is part of a block in the Blockchain)
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How to step 4

Download Your Proof File

Download your proof file (Submitted or Confirmed status only).

The chainstamp proof file can be used to verify your timestamped entries in the blockchain independently of our company. It ensures you can always verify your data forever. Read more in our faq.
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