Culwick Choral Society is an amateur choir in Dublin, founded in 1898 by the English born, musician and choirmaster Dr. James Cooksey Culwick.About Us Culwick Choral Society Following Dr. Culwicks dea
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 0x686bc5d7a58bfbe6b6b2bbb24966a04bcc0f3b85e7b16126c0ab4da7f8ea12bc. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/100c2f9b-4d99-489c-867b-063249bf5d0b.json and https://artists.proofprofile.net/proofs/artist/100c2f9b-4d99-489c-867b-063249bf5d0b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).