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 0xc64ad6b7f5d72ee9a9b767d61bffd7155f4b2e8ef2ed38bd0a6e31aa6eefe1f6. Chain 2 (Bitcoin): anchored in block 953678 (2026-06-14T19:23:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/629e806b-a2e7-4b0b-bde7-4c496f50b889.json and https://artists.proofprofile.net/proofs/artist/629e806b-a2e7-4b0b-bde7-4c496f50b889.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Riding Gertrude's Train: The Baltimore Tapes, 1988-91, Vol. 1
Jetspeed Records Compilation 2011 Volume 1