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 0x8d944bb738c09eb8838acbaf82bd604960a39240bb697ae51ba83b9ee6f1ffb0. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/99a009bd-0e25-490b-a0b3-13c0f2e1c3a1.json and https://artists.proofprofile.net/proofs/artist/99a009bd-0e25-490b-a0b3-13c0f2e1c3a1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).