John Ferrillo is an American oboist. He has been the Principal Oboe of the Boston Symphony Orchestra since 2001. He is also member at the Tanglewood Music Center. Prior to these posts, he was Co-Prin
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 0x5c16aecc4d72eaa4dc3bda4d22e5f61fe2689108e8c822d4640d8bd9d2f10d00. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0937c68e-93da-4aa4-8897-44bfe38985e7.json and https://artists.proofprofile.net/proofs/artist/0937c68e-93da-4aa4-8897-44bfe38985e7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Taverner: To a Child - Birtwistle: Entr'actes