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 artist was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd56efaa2dc5291ecdb652a88d6e07f0d386c937c0b5b8251e4b549ab6ffd606. Chain 2 (Bitcoin): anchored in block 953610 (2026-06-14T07:58:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/150b60e8-ce76-464b-9f9d-2c8ff6e813c4.json and https://artists.proofprofile.net/proofs/artist/150b60e8-ce76-464b-9f9d-2c8ff6e813c4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).