Henry Fairs (born 1976) is an English organist. He is organist to the University of Birmingham and Head of Organ Studies at the Birmingham Conservatoire. Since winning the Odense International Organ C
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 0x430256209411df857b4ce5cb0ce57bd349019528862ecf2a082b25fa174a945b. 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/f73548ac-9765-471c-ae5a-9b56ed82fd5b.json and https://artists.proofprofile.net/proofs/artist/f73548ac-9765-471c-ae5a-9b56ed82fd5b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).