HOMOSTAMP Independent Verification Tool

Serverless · Browser-Only · On-Chain

Verify your record
autonomously.

This page never communicates with Homostamp servers. When you provide your verification code, timestamp file (.tsr), and original work, it recalculates the cryptographic hash entirely in your browser and queries the Polygon blockchain directly.

Proof Components 3 parts · concatenated sequentially
1

The code printed on your certificate. E.g., HS-93AF01C1E7B2

2

The .tsr file included in your downloaded proof package.

3

Must be the exact identical file as it was at the moment of stamping.

What exactly does this page do?

  1. In-Browser Computes the SHA-256 cryptographic digest of your original file.
  2. In-Browser Parses the .tsr file to extract the official TSA serial number.
  3. In-Browser Combines the verification code, serial number, and file hash to generate the final seal hash.
  4. On-Chain Queries the smart contract on Polygon to check if this exact seal exists on the ledger.

Even if Homostamp.com goes offline or ceases to exist entirely — as long as you hold your certificate, the .tsr file, and the original work, this verification remains completely functional. Contract: 0x38Fae...C76F8 ↗

Out of scope: This utility strictly validates the blockchain ledger state; it does not independently verify the TSA's cryptographic signature chain (CMS/RFC3161 certificate path validation).