"McNamara's Band" (originally "MacNamara's Band") is a popular song composed in 1889 by Shamus O'Connor (music) and John J. Stamford (lyrics). The song was performed as a music hall routine by William
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 0x4970a9020fe8e815e2a65b9cbda01ca04ca3558efe58d7cba87fcd323c58c021. 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/742cf2c1-f990-4753-b2de-ad1f5a8bca5f.json and https://artists.proofprofile.net/proofs/artist/742cf2c1-f990-4753-b2de-ad1f5a8bca5f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).