Cathal Dunne
type: MusicGroup
description: 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
popularity: 2
followers: 13
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xa2684b6034988021a923aad0b411600013bbeb9c363d15d226481e7127f55b6e
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954066
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954066
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/6b3f8cf6-6cf1-4a5a-a26b-d5b7cc367054.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/6b3f8cf6-6cf1-4a5a-a26b-d5b7cc367054.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/6b3f8cf6-6cf1-4a5a-a26b-d5b7cc367054
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:11:48Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xa2684b6034988021a923aad0b411600013bbeb9c363d15d226481e7127f55b6e","name":"Cathal Dunne","registered_at":"2026-06-17T03:02:16Z","symbol":"NIM1260548","token_address":"0x31a31740992389cd28cef7a553851540793063a2","type":"artist","uuid":"6b3f8cf6-6cf1-4a5a-a26b-d5b7cc367054"}
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: 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).
  date published: 2026-06-17T08:11:48Z
  text: {"copyright_id":"0xa2684b6034988021a923aad0b411600013bbeb9c363d15d226481e7127f55b6e","name":"Cathal Dunne","registered_at":"2026-06-17T03:02:16Z","symbol":"NIM1260548","token_address":"0x31a31740992389cd28cef7a553851540793063a2","type":"artist","uuid":"6b3f8cf6-6cf1-4a5a-a26b-d5b7cc367054"}