Matthew Crosby (born 12 February 1980) is an English comedian and writer. Early life Matthew Crosby was born in Bromley, London. He attended St Olave's Grammar School., and went on to study English
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 0x6871fb509ef61f2685abc4dfa1f02eaf759e5ee98a84b059348442205d7d0282. Chain 2 (Bitcoin): anchored in block 953772 (2026-06-15T10:33:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c98cca85-ca53-4979-8dc1-09452a272e0f.json and https://artists.proofprofile.net/proofs/artist/c98cca85-ca53-4979-8dc1-09452a272e0f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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