Certificate of authenticity · Verification code SX5FENM6TG · Version 1
Jeton Paese di Bengodi (Heliotrop)
Tim Berresheim
| Inventory number | TB19/M 132 |
|---|---|
| Year | 2019 |
| Technique | Öl auf Holz |
| Dimensions | 15 × 120 × 120 cm |
| Edition | unique |
| 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
31d44792d461297573fe4dbbf71034a3b8ca03a2f0003d8093ee032cb8d20051- Signature (Ed25519, Base64)
pCj2Zd7+1e2kKZBECwu/oDiJ2xNokGnyZzo05sKMFpwq9nngzJY6v8vWowgH61inaEPcxyPKPh/H1wk8tQFxAg==- Artist’s public key
0a347c3cdcf869a45213eb6eea4e65d4f60adb6d1fe7d9be59eace1f04584708- SHA-256 of the main image
c3f9ad0bbbd7917156e74f7b1ccc893577264138a4e4af01e845957b90da7dd7
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.