Brian Samuel Epstein ( ; 19 September 1934 – 27 August 1967) was an English music entrepreneur who managed the Beatles from 1961 until his death in 1967. Epstein was born into a family of successful
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 0x8a677e49551922c5b403c3b7eb227f1237ea58f27b90b1431d107b9aeeb6146e. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/43a6b42a-6a85-431d-8d73-f2cd1e733d34.json and https://artists.proofprofile.net/proofs/artist/43a6b42a-6a85-431d-8d73-f2cd1e733d34.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).