Ioan Gruffudd
type: MusicGroup
genre: spoken word
description: Ioan Gruffudd (; ; born 6 October 1973) is a Welsh actor. He is known for his roles in film and television series in the United Kingdom, the United States, and Australia. Gruffudd became known for hi
popularity: 9
followers: 228
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xd331a41fc8c043b04164da05e115b1ae502509a62d569fa6c52397a9363e3d97
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954019
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954019
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/377ca9be-9d7e-4ac7-9962-1d3f0e4f8c32.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/377ca9be-9d7e-4ac7-9962-1d3f0e4f8c32.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/377ca9be-9d7e-4ac7-9962-1d3f0e4f8c32
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T23:44:13Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xd331a41fc8c043b04164da05e115b1ae502509a62d569fa6c52397a9363e3d97","name":"Ioan Gruffudd","registered_at":"2026-06-16T08:51:32Z","symbol":"NIM1000318","token_address":"0xe18a6d84354562a41808abd1107545eb46c9ce2c","type":"artist","uuid":"377ca9be-9d7e-4ac7-9962-1d3f0e4f8c32"}
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 0xd331a41fc8c043b04164da05e115b1ae502509a62d569fa6c52397a9363e3d97. 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/377ca9be-9d7e-4ac7-9962-1d3f0e4f8c32.json and https://artists.proofprofile.net/proofs/artist/377ca9be-9d7e-4ac7-9962-1d3f0e4f8c32.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
  text: {"copyright_id":"0xd331a41fc8c043b04164da05e115b1ae502509a62d569fa6c52397a9363e3d97","name":"Ioan Gruffudd","registered_at":"2026-06-16T08:51:32Z","symbol":"NIM1000318","token_address":"0xe18a6d84354562a41808abd1107545eb46c9ce2c","type":"artist","uuid":"377ca9be-9d7e-4ac7-9962-1d3f0e4f8c32"}