John J. Berberian (born October 9, 1941) is an American musician known for his virtuosity on the oud, the Middle Eastern stringed instrument. Early life Berberian was born in New York City as the son
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 0xab373ae52c150251fce0f1c080fae0061673ce718a56a411d9f6df330d0faf02. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/589d791b-c0ec-4cab-a7d4-622b6e6b4752.json and https://artists.proofprofile.net/proofs/artist/589d791b-c0ec-4cab-a7d4-622b6e6b4752.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Ode To An Oud: Artistry Of John Berberian
Expressions East - Oud of John Berberian