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 0x550f538a5ce26ed35a1b1034561a8e74b2b38fb52bb47c51d6ca510a7217b62b. 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/c70476d7-a657-4f7a-bb2d-537d5a9b15b2.json and https://artists.proofprofile.net/proofs/artist/c70476d7-a657-4f7a-bb2d-537d5a9b15b2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).