Certificate of authenticity · Verification code 8VHPSPZXYT · Version 1
Tarnen&Täuschen (tl;dr) SOS Care II
Tim Berresheim
| Inventory number | TB12/F 151/2 |
|---|---|
| Year | 2012 |
| Technique | Face-Mount Archival Pigment Print hinter Acrylglas, rückseitig auf Aluminium kaschiert, gerahmt. |
| Dimensions | 180 × 120 cm |
| Edition | 2/3 |
| 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
8a7a314e1f72795c0d5e833a6a17010f7d72a3f498e7f32a2f392a971788c0b1- Signature (Ed25519, Base64)
L9DTI/Bw6H6dIuZUcjYJP8RV7J7otn3N25S03oJGog/9RN9KLaL1AZUEPCBuv84ivAtj7RO1eu5qkg28TuzWCw==- Artist’s public key
0a347c3cdcf869a45213eb6eea4e65d4f60adb6d1fe7d9be59eace1f04584708- SHA-256 of the main image
7871ee2810384bac71ef54c8ee3f7a4d66c345429804331be061bee804132237
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.