Certificate of authenticity · Verification code UK3TM89HS9 · Version 1
The early bird (sigh) Traces VII (Revisited)
Tim Berresheim
| Inventory number | TB18/F 189/2 |
|---|---|
| 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
37e13e7f988ff89d59dc63ca7f740cc4f450a7c137e9fd06287233ff28dc181e- Signature (Ed25519, Base64)
V0L81Gi0Vc5K09TFJudm30TThNTSBDhKXjUSdTo91b0LB4eymJLAtMterFsAo55PsJCue/ARlwWLMdQZToIRBg==- Artist’s public key
0a347c3cdcf869a45213eb6eea4e65d4f60adb6d1fe7d9be59eace1f04584708- SHA-256 of the main image
62eccfe2fa5d4bd7563b9961e8d0ef1cd64d294d8d04379fe30757c54029350a
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.