Certificate of authenticity · Verification code 93KH3JNE8U · Version 1
Glocke (coherence) Family
Tim Berresheim
| Inventory number | TB16/E 49/1 |
|---|---|
| Year | 2016 |
| Technique | Radierung |
| Dimensions | 20 × 14 cm |
| Edition | 1/7 |
| 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
468f733a4491a77a7e9409a432a99b4b21cbc5ec3186d0aa496effb01151fdf5- Signature (Ed25519, Base64)
l++p0n4y9sW2kPUBGYmIahPiuCt5w1qG31lSt0WHa8NFaBEvn9r3tTuKHUhQYmPvOi3CxQuDlSf51KBaUBofDg==- Artist’s public key
0a347c3cdcf869a45213eb6eea4e65d4f60adb6d1fe7d9be59eace1f04584708- SHA-256 of the main image
25af76b4d50e63cadcaa1aed246ff91d7eae709532f33ece929c90a517f690f4
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.