Sunparlour Players are a Canadian alternative country band. Based in Toronto, Ontario, the band consists of songwriter Andrew Penner on lead vocals, guitar, bass, banjo, keyboards, bass organ pedals,
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 0xdc11e8eef4eb27501c192582a5c0240514d8df0ded09fdf310fd0336629b1fd5. Chain 2 (Bitcoin): anchored in block 954063 (2026-06-17T07:49:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4810114e-0998-4e95-a773-a4d6e7ddc058.json and https://artists.proofprofile.net/proofs/artist/4810114e-0998-4e95-a773-a4d6e7ddc058.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).