Certificate of authenticity · Verification code KJCSPRRKAY · Version 1
Future Gipsy . Gimbal & Bier
Tim Berresheim
| Inventory number | TB20/M 150 |
|---|---|
| Year | 2020 |
| Technique | Harz und Pigmente auf Leinwand |
| Dimensions | 260 × 100 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
4fd58bed68fbb6a9085ef93348b23b2deb18f52d6a632474ad486a4a833d948c- Signature (Ed25519, Base64)
dMi7qnj5/3ICjcDUgNdSKUsttPGb2Qvw0qXxhxFswSUR4dpkRXkLHiPoFXzhxB44daUtSJZxl2CifkvLGnihDQ==- Artist’s public key
0a347c3cdcf869a45213eb6eea4e65d4f60adb6d1fe7d9be59eace1f04584708- SHA-256 of the main image
8bb0082ca6869f72c9037ebf357e4f614c789a414b60a1d1e5e0b4d8956fd1f1
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.