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 0x42d43ab3d4c2916eb45858ec00417352a931abaf8d0083bac8c0e90dc3f6a2ec. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e05205d9-6e33-4315-a8f1-8e4e99ddf84e.json and https://artists.proofprofile.net/proofs/artist/e05205d9-6e33-4315-a8f1-8e4e99ddf84e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
New Indie Folk; October 2022 (Indie Folk Central)