In Defence is a four-part British television legal drama series, created and partially written by Mike Cullen, that first broadcast on ITV on 26 June 2000. The series stars Ross Kemp and Sophie Okoned
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 0xdd196d987a29b8db9d6e806dabbce92669c7ef192d2d30bb4cdd7b06b1e3df54. Chain 2 (Bitcoin): anchored in block 954728 (2026-06-21T18:08:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f8b9c3ac-7cc2-45c3-a324-5e06a7d5655d.json and https://artists.proofprofile.net/proofs/artist/f8b9c3ac-7cc2-45c3-a324-5e06a7d5655d.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Into The Sewer (the reissue: featuring new subliminal messages)