Cathal Dunne (born 14 February 1951) is an Irish singer. He is most famous for representing Ireland in the 1979 Eurovision Song Contest with the song "Happy Man". He has since gained a following as Ca
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 0xa2684b6034988021a923aad0b411600013bbeb9c363d15d226481e7127f55b6e. 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/6b3f8cf6-6cf1-4a5a-a26b-d5b7cc367054.json and https://artists.proofprofile.net/proofs/artist/6b3f8cf6-6cf1-4a5a-a26b-d5b7cc367054.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).