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 0x79acd1fc73a43b70f0d74a9737c7f421f8d97008556149d7dc1493aa21abe7be. Chain 2 (Bitcoin): anchored in block 953780 (2026-06-15T12:02:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d4682c8a-dfb5-49b0-98f3-6a9b44fa413a.json and https://artists.proofprofile.net/proofs/artist/d4682c8a-dfb5-49b0-98f3-6a9b44fa413a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).