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 0xaf357bb795fdd8e33cb4b55bf334223898757eb4f8fbb68cfa0a9950284c8c7a. Chain 2 (Bitcoin): anchored in block 953879 (2026-06-16T02:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/09f28fc9-a827-4934-8d20-fd91c5c2760e.json and https://artists.proofprofile.net/proofs/artist/09f28fc9-a827-4934-8d20-fd91c5c2760e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
From the Shores of the Golden Horn (Music of the Spanish Jews of Turkey)
Under Aegean Moons: Music of the Spanish Jews of Rhodes and Salonika
Full Circle: Music of the Spanish Jews of Jerusalem
The Sword of the Dove: A Judeo-Spanish Purim Fantasia