Certificate of authenticity · Verification code Y5B8JKU8CK · Version 1
The early bird (sigh) Traces III (Revisited)
Tim Berresheim
| Inventory number | TB18/F 185/2 |
|---|---|
| Year | 2018 |
| Technique | Baryt |
| Dimensions | 50 × 60 cm |
| Edition | 2/3 |
| Issued | 13.11.2026, 08:06 |
Timestamp anchored in Bitcoin, block 975648.
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
fea77466f1c37da51388de061321d73ae9e9facfe2e728f66b7e1592d105e797- Signature (Ed25519, Base64)
uJQOY540jbEdpVrn+xJaAJ2JTzVx6lVRmp3GFrE3hZ07Butr6k+M9esMv4Jevqvk44RW77pEsEmjQISUUknQAQ==- Artist’s public key
0a347c3cdcf869a45213eb6eea4e65d4f60adb6d1fe7d9be59eace1f04584708- SHA-256 of the main image
c3f7110b0b02ce57a4453455cba0146e3809b358992ab986be9685dc89cf7ffd
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.