Certificate of authenticity · Verification code BJDMGK32YE · Version 1
Private Waggle Dancer I
Tim Berresheim
| Inventory number | TB15/P 58/1 |
|---|---|
| Year | 2015 |
| Technique | Harz und Pigmente auf Papier |
| Dimensions | 140 × 110 cm |
| Edition | 1/3 |
| 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
b2acb602e99306722acb970ce66f49769a52581c995a1bea5fcf63892bc92716- Signature (Ed25519, Base64)
+b2ZLhQG0uMSYquhZw06sA85nVTblDt7W54jXberrJ8N5AUFHWgOA9vg+6OgvkZ4kGluSrFpgtXXz4/BXhp8Cw==- Artist’s public key
0a347c3cdcf869a45213eb6eea4e65d4f60adb6d1fe7d9be59eace1f04584708- SHA-256 of the main image
2630a78fe6545ba35c86029eef0a99329341df13ea041e92628a5dcc9870dba0
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.