Certificate of authenticity · Verification code TPNL944TMV · Version 1
Haulage Technokomplex Draught Alab4stro
Tim Berresheim
| Inventory number | TB24/P 373 |
|---|---|
| Year | 2024 |
| Technique | Face-Mount Archival Pigment Print hinter Acrylglas, rückseitig auf Aluminium kaschiert, gerahmt. |
| Dimensions | 30 × 24 cm |
| Edition | unique |
| Issued | 12.11.2026, 08:38 |
Timestamp anchored in Bitcoin, block 975540.
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
66382e786f8aca0994fa3e5455b4a3089f572da71c9a313c32cfc7f4fcb44172- Signature (Ed25519, Base64)
TlktVmi2cnHrbpsc3iTrPidrIh01VedmZ57+/rkYiwFq2l6gdtW6JFMwVVBD6nsbjWsrJ+ui+PcFK96BLFv0Bg==- Artist’s public key
0a347c3cdcf869a45213eb6eea4e65d4f60adb6d1fe7d9be59eace1f04584708- SHA-256 of the main image
2429c05b3fb183f5985ac0511085e856eca56ee4911983aa5daf6fd2d14a95ad
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.