Sir Sydney Hugo Nicholson (9 February 1875 – 30 May 1947) was an English choir director, organist, composer, and founder of the Royal School of Church Music (RSCM) and the compiler of The Parish Psal
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 0x537e9837e2cce3d9d667bf9b6c972a57cab7460783c700f96121bea1013b3e24. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0320dde7-a026-4efc-ba34-48e550a6706c.json and https://artists.proofprofile.net/proofs/artist/0320dde7-a026-4efc-ba34-48e550a6706c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).