Paul Barbarin & His New Orleans Jazz Band
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 0xd29c7e75f195b5c30751a83e90c705a57731fe9854280d40cfa60b5c7eddb465. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fcafac57-7965-4b6b-aab5-795320ac10da.json and https://artists.proofprofile.net/proofs/artist/fcafac57-7965-4b6b-aab5-795320ac10da.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Oxford Series - Vol. 15 (Afternoon Concert)
The Oxford Series - Vol. 16 (Evening Concert)
Paul Barbarin and His New Orleans Jazz Band