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 0x9036ac7c33c2bcec89f8458c4c578e8c6414ce1cccd7440e847ec88cfb8d0309. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d2acf8c9-38a0-4bac-8146-338b0d4dca36.json and https://artists.proofprofile.net/proofs/artist/d2acf8c9-38a0-4bac-8146-338b0d4dca36.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).