Certificate of authenticity · Verification code KVBHNZG24B · Version 1
Whey Lemon Law ?
Tim Berresheim
| Inventory number | TB16/P 93 |
|---|---|
| Year | 2016 |
| Technique | Archival Print auf Alu-Dibond aufgezogen, im Vitrinenrahmen |
| Dimensions | 65 × 52 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
2cd91daef5edf0a84b8ba3d2fa2ba3213adfeac352ef028bb5fc524cb00406f5- Signature (Ed25519, Base64)
EZlSxnp9qTQOw7ufcLNGK9pJ3my2xnjFdV97Q86k18OWHg91L9XcGpVrUgkibuhFlpYiUtxBXG/QxailR9leAQ==- Artist’s public key
0a347c3cdcf869a45213eb6eea4e65d4f60adb6d1fe7d9be59eace1f04584708- SHA-256 of the main image
afd076c1d999a0d86f1435ad40caedd5e57f3a8799a930ea8280a142b6558f32
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.