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 0xbcdf548938d72ef7ff7b9a257ac34cc5dba0c9412da3272a21738527f6c30973. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9e97f60f-d68b-4e16-92e3-eb0b6b34d014.json and https://artists.proofprofile.net/proofs/artist/9e97f60f-d68b-4e16-92e3-eb0b6b34d014.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Indie / Rock / Alt Compilation: December 2022