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 0x96b28fba7c38ae57897f59b0945337cac152dde2f6f978e457e3ed458d66bf5c. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4e8bda2b-ed6c-4db2-8e27-9da224ae8ca4.json and https://artists.proofprofile.net/proofs/artist/4e8bda2b-ed6c-4db2-8e27-9da224ae8ca4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).