Lewisham ( ) is an area of southeast London, England, south of Charing Cross. It is the principal area of the London Borough of Lewisham, and was within the historic county of Kent until 1889. It is
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 0x94cef52681f9dec6c297f808e6a4bd93fbfbb55b14cb073c58c7c85fb25d2155. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d0989ed7-b1cb-4c4d-bae6-b000ab16dffa.json and https://artists.proofprofile.net/proofs/artist/d0989ed7-b1cb-4c4d-bae6-b000ab16dffa.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).