Hywel Gwynfryn
type: MusicGroup
description: Hywel Gwynfryn (born 13 July 1942) is a Welsh television and radio personality and lyricist. He started working for the BBC in 1964 and joined BBC Radio Cymru at its inception, being the first voice h
popularity: 2
followers: 19
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xe3361f627da1e17ed83a4ae4565c30ce2537f576e17eb199bdc17521fa439f29
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954065
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954065
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/5624713c-a9a2-42f2-8345-ff0e83c5d363.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/5624713c-a9a2-42f2-8345-ff0e83c5d363.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/5624713c-a9a2-42f2-8345-ff0e83c5d363
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:10:43Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xe3361f627da1e17ed83a4ae4565c30ce2537f576e17eb199bdc17521fa439f29","name":"Hywel Gwynfryn","registered_at":"2026-06-16T19:44:24Z","symbol":"NIM1156085","token_address":"0xde6fe0cce071ab68f2690a0ed5bb955e44f584ab","type":"artist","uuid":"5624713c-a9a2-42f2-8345-ff0e83c5d363"}
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 0xe3361f627da1e17ed83a4ae4565c30ce2537f576e17eb199bdc17521fa439f29. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5624713c-a9a2-42f2-8345-ff0e83c5d363.json and https://artists.proofprofile.net/proofs/artist/5624713c-a9a2-42f2-8345-ff0e83c5d363.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:10:43Z
  text: {"copyright_id":"0xe3361f627da1e17ed83a4ae4565c30ce2537f576e17eb199bdc17521fa439f29","name":"Hywel Gwynfryn","registered_at":"2026-06-16T19:44:24Z","symbol":"NIM1156085","token_address":"0xde6fe0cce071ab68f2690a0ed5bb955e44f584ab","type":"artist","uuid":"5624713c-a9a2-42f2-8345-ff0e83c5d363"}