Certificate of authenticity · Verification code 4WTL3URDVQ · Version 1
L'insegnante di flauto balla come un derviscio
Tim Berresheim
| Inventory number | TB22/F 376 |
|---|---|
| Year | 2022 |
| Technique | Baryt |
| Dimensions | 60 × 50 cm |
| Edition | unique |
| Issued | 13.11.2026, 08:05 |
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
214927f29865041b2392534bffde21ccc8bf44077db77c388399316555e0ef2e- Signature (Ed25519, Base64)
XC3t3cos42s0+JGhIKnoIn+aXOJj26fc5Y5e6FPQ+d6JV3UMvj14Ejb3OYa/Oz5OWyM1vEhm/+0XxFMbaSsSDQ==- Artist’s public key
0a347c3cdcf869a45213eb6eea4e65d4f60adb6d1fe7d9be59eace1f04584708- SHA-256 of the main image
5712b722848bf97c843c6e249629e192214791768b1c7c232d5e4fd752343ec3
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.