That Fucking Tank are an alternative rock duo that formed in Leeds, England, in 2003. History Andy Abbott (baritone guitar played through multiple amplifiers) and James Islip (drums) met in the early
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 0x6b436ea0841042e3d306e048751c4624c49ff86c6aae616337702e62924b6949. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1d17457a-fa49-4d69-8e3a-bf3f49be1188.json and https://artists.proofprofile.net/proofs/artist/1d17457a-fa49-4d69-8e3a-bf3f49be1188.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).