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 0xde7f7786e256c05a023e68b2f0aaff27e27d957ae7d9acd318d35e1b71e9e869. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f94a76e7-5793-4eac-a63a-227b876ccef6.json and https://artists.proofprofile.net/proofs/artist/f94a76e7-5793-4eac-a63a-227b876ccef6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Mark Sherman 4tet Live @ Chorus Jazz Club
Mark Sherman Live At The Bird's Eye Vol. 2