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 0x1dcb112a4fdb14011ac7c9713468aa0cc9fc0992096b4bbf5fe6587a245ac08a. Chain 2 (Bitcoin): anchored in block 953662 (2026-06-14T17:28:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/55aadf1a-5d8a-45f6-8fa8-c381511498c0.json and https://artists.proofprofile.net/proofs/artist/55aadf1a-5d8a-45f6-8fa8-c381511498c0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).