William Havergal Brian (29 January 187628 November 1972) was an English composer, librettist, and church organist. He is best known for having composed 32 symphonies—an unusually high number amongst
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 0xf91cae13b0c14080cf03bfe0c70b966b9aadbb783f61c199be9bc3d3039363ae. Chain 2 (Bitcoin): anchored in block 953610 (2026-06-14T07:58:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/13510e10-b742-4e47-afff-71ec9a96f9ca.json and https://artists.proofprofile.net/proofs/artist/13510e10-b742-4e47-afff-71ec9a96f9ca.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Brian: Symphony No. 18 / Violin Concerto / The Jolly Miller