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 0x0145416ebb154fb854e7d4e7cd8e20e7bfbeab354c802c26b98cd982a5d3d29e. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/90c398c6-406c-4835-8b9a-779d2a9de2f8.json and https://artists.proofprofile.net/proofs/artist/90c398c6-406c-4835-8b9a-779d2a9de2f8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).