David Hayden Brain (born 4 October 1964) is a former Zimbabwean cricketer who played in nine Test matches and 23 One Day Internationals from 1992 to 1995.Cricinfo He was born at Salisbury, then in Sou
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 0x2b5c99b8302eb7a3b7dd0e094931019aeda9c365881ba87c5e8402e64fb8f1f2. Chain 2 (Bitcoin): anchored in block 954516 (2026-06-20T07:04:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a2b1f8c4-efe6-49be-b3d6-f5b16fd077ef.json and https://artists.proofprofile.net/proofs/artist/a2b1f8c4-efe6-49be-b3d6-f5b16fd077ef.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Rachmaninoff Etudes-Tableaux, Op.39 and Beethoven Sonata in E Major, Op.109
Kapustin Twenty-Four Preludes, Op. 53 and Sonata No.1, Op.39