1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71c3d0ce65cb8cee4d39b156ec0da3301c30d27a5c075c00e2e73aaf2f244b8c. Chain 2 (Bitcoin): anchored in block 954729 (2026-06-21T18:16:07Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f8ac0cb5-d456-4b34-b5c5-639772d0d8a0.json and https://artists.proofprofile.net/proofs/artist/f8ac0cb5-d456-4b34-b5c5-639772d0d8a0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Kaltes Krematorium (Bericht aus dem Land namens Auschwitz | Mit einem Nachwort von Carolin Emcke)