Certificate of authenticity · Verification code CELCDE5E5T · Version 1
Haulage Technokomplex Draught P0rpora tr4ffico
Tim Berresheim
| Inventory number | TB24/P 374 |
|---|---|
| Year | 2024 |
| Technique | Face-Mount Archival Pigment Print hinter Acrylglas, rückseitig auf Aluminium kaschiert, gerahmt. |
| Dimensions | 30 × 24 cm |
| Edition | unique |
| Issued | 12.11.2026, 14:51 |
Timestamp anchored in Bitcoin, block 975566.
Verification
- …Checksum of the certificate file
- …Artist’s signature
- …Timestamp in Bitcoin
- ·ImageDrop the image file here to compare it with the certificate.
Drop a file here: image, certificate (.json), signature (.sig) or timestamp (.ots). Nothing is uploaded; everything is computed in your browser.
Verification data
- SHA-256 of the certificate file
2003f2301982f7ff99cd86d97ef4caedc18089ed2466f223a5f3194b03884f70- Signature (Ed25519, Base64)
19tSwhRNUOK3S9/Vsi9gOHGTx1jbbtCy5zl5EerM0IB5WC4Zqugx/Ssq15ofnmyFP0Elmzf3EjCWx8qNdzEXBg==- Artist’s public key
0a347c3cdcf869a45213eb6eea4e65d4f60adb6d1fe7d9be59eace1f04584708- SHA-256 of the main image
84257d2769fc6b53000d604c612c901d0c194c9207896c999404340df38986a6
How to verify this independently of this page: hash the JSON file with SHA-256; the value must match the checksum above. Verify the signature against that checksum with the public key (Ed25519). Check the .ots file together with the JSON file at opentimestamps.org: this proves since when the checksum has been in the Bitcoin blockchain. The proof depends neither on this address nor on the artist, only on certificate, key and blockchain.