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 0x1c5c7462453de7c40c5fae3fadcee23a41f7cb33c854ebad4b40609090918290. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d34bd53d-a9c2-4f50-99d4-e3ec9b70d88b.json and https://artists.proofprofile.net/proofs/artist/d34bd53d-a9c2-4f50-99d4-e3ec9b70d88b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).