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 0x024916172d629dbf17d52e164baeea30911b2de44fd5a11ba43f1c5f8a766e95. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9ab3682e-5374-4074-8d5e-4670a58bd7d5.json and https://artists.proofprofile.net/proofs/artist/9ab3682e-5374-4074-8d5e-4670a58bd7d5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Eastern European Folk Tunes for Accordion - 33 Traditional Pieces
Klezmer and Sephardic Tunes - 33 Traditional Pieces for Accordion