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 0xd43bde853249bcf35aaf9cf0e53a308d7934ff5a03604e3caeb5994898b4f789. Chain 2 (Bitcoin): anchored in block 954549 (2026-06-20T10:56:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a90d9cd5-c477-4611-a166-ee8ac7a32f5e.json and https://artists.proofprofile.net/proofs/artist/a90d9cd5-c477-4611-a166-ee8ac7a32f5e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).