Certificate of authenticity · Verification code HAEET3P6XT · Version 1
brandelli di nuvole VI
Tim Berresheim
| Inventory number | TB14/E 45 |
|---|---|
| Year | 2014 |
| Technique | Risographie |
| Dimensions | 44 × 31 cm |
| Edition | 40 |
| 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
2588e914d6e849c33dc6a2f489864d33d694e01acfa460fde21aad2ec1032235- Signature (Ed25519, Base64)
YoKBBtLVGEEqvoSF/i4xoiPpB6pL3qNWJUzz1Egv0xshEEJIP1qtIWYPcPzyLhYeSyOQvgilCuM3Rsk0Z/i1Aw==- Artist’s public key
0a347c3cdcf869a45213eb6eea4e65d4f60adb6d1fe7d9be59eace1f04584708- SHA-256 of the main image
e3d1cce280e2aa598d64ae448579b0ce08826897ee40d474ebdbdfea2312ddfa
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.