hygiene.tattoo · hygiene.tattoo/en/verify/

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Verify a certificate

Scan the QR code with your phone camera – or enter the number.

Enter number

The number is at the bottom of the certificate and starts with HT-.

How verification works
  1. Online The QR code or the number leads to this page. It shows the current status from our register – including whether a certificate has been revoked or replaced.
  2. PDF comparison A checksum (SHA-256) is calculated from the file on the device and compared with our register. The file itself is not uploaded.
  3. Offline Every certificate is digitally signed. The signature can be checked with our public key even without this website.

Public keys

  • Signing key 2026 since 01.01.2026 SHA256:9F2C 41AB 77E0 13D5 C8A2 6B90 1E4F 03C7

More about the procedure for public health offices

The verification confirms the authenticity and content of a certificate. Whether it is sufficient in an individual case is decided by the responsible public health office.