Billy Mahonie is a British post-rock band. The rock quartet formed in London in 1997 with Gavin Baker (guitar), Howard Monk (drums), Hywell Dinsdale (bass and guitar) and Kevin Penney (bass). In 1999,
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 0xc886e965636d48a7569ed41da1de5c071231d4d9f527727167caf747c5314832. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6fe32420-1bf3-4e6e-a5ed-57c11a93a425.json and https://artists.proofprofile.net/proofs/artist/6fe32420-1bf3-4e6e-a5ed-57c11a93a425.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).