Certificate of authenticity · Verification code KUF7WDXDL3 · Version 1
Mort, Somnambulisme, Ivresse
Tim Berresheim
| Inventory number | TB19/F 234 |
|---|---|
| Year | 2019 |
| Technique | Baryt |
| Dimensions | 180 × 150 cm |
| Edition | unique |
| Issued | 10.11.2026, 06:32 |
Timestamp anchored in Bitcoin, block 975269.
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
5a38c254f45cf202d5b3496d19418ce243e72d2587a42e4f2163529d0aa38805- Signature (Ed25519, Base64)
vqpEqF240+vddHxQ+/PSpuS7ki6FViwsIs3xSfK9YYLpUyoni8wcKR77s7WZHQSCqEutt436uuKAAi+7f+XUBg==- Artist’s public key
0a347c3cdcf869a45213eb6eea4e65d4f60adb6d1fe7d9be59eace1f04584708- SHA-256 of the main image
fe10e3e0dae8a2c40a6ae4b8cdc58cd362484e16ee127002185f2aa5cb8f601f
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.