Andrew-John Smith is an English church musician, concert organist and conductor. Between 2008 and 2012, he recorded the complete organ works by Camille Saint-Saëns in three volumes. Since 1997, he has
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a8d4f51f4ea94555ba4119c50d64150af89b60a27925b4c830c1d776b4eea38. 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/5aad3ed4-2516-4bd6-a5f8-86eb459595d4.json and https://artists.proofprofile.net/proofs/artist/5aad3ed4-2516-4bd6-a5f8-86eb459595d4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).