1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 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 entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf217f57bec75e75587d07c98268c0e4d32950dd32b5d757c799b2c027f21164. Chain 2 (Bitcoin): anchored in block 954569 (2026-06-20T14:36:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b0d0e36e-4220-4601-94e5-5edbfc04da5a.json and https://artists.proofprofile.net/proofs/artist/b0d0e36e-4220-4601-94e5-5edbfc04da5a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Powell: Towards the Light - Corea: Children's Songs - Yoshimatsu: Fuzzy Bird Sonata, et al.
Alto Saxophone Exam Pieces, Starting 2014, ABRSM Grade 4
Buckland, R.: Gameshow - Saxophone Concertos