Kobna Holdbrook-Smith
type: MusicGroup
genre: musicals
description: Kobna Kuttah Holdbrook-Smith is a Ghanaian born British actor. He has played roles in films, including Father Richard Emery in Ghost Stories (2017), Oliver in The Commuter, Templeton Frye in Mary Popp
popularity: 19
followers: 114
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x8d67429f3af55180485b291a1368cfba7df5e97b608364689e5ebdcb78fd4a76
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953777
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953777
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/cbb84809-71e0-4236-ac93-d6d660e94521.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/cbb84809-71e0-4236-ac93-d6d660e94521.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/cbb84809-71e0-4236-ac93-d6d660e94521
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-15T11:52:51Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x8d67429f3af55180485b291a1368cfba7df5e97b608364689e5ebdcb78fd4a76","name":"Kobna Holdbrook-Smith","registered_at":"2026-06-15T01:55:20Z","symbol":"NIM0645563","token_address":"0xd24c5201d816da4d192e0d6a8799fdf3703c6c47","type":"artist","uuid":"cbb84809-71e0-4236-ac93-d6d660e94521"}
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 0x8d67429f3af55180485b291a1368cfba7df5e97b608364689e5ebdcb78fd4a76. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cbb84809-71e0-4236-ac93-d6d660e94521.json and https://artists.proofprofile.net/proofs/artist/cbb84809-71e0-4236-ac93-d6d660e94521.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-15T11:52:51Z
  text: {"copyright_id":"0x8d67429f3af55180485b291a1368cfba7df5e97b608364689e5ebdcb78fd4a76","name":"Kobna Holdbrook-Smith","registered_at":"2026-06-15T01:55:20Z","symbol":"NIM0645563","token_address":"0xd24c5201d816da4d192e0d6a8799fdf3703c6c47","type":"artist","uuid":"cbb84809-71e0-4236-ac93-d6d660e94521"}
album: The Hunter
  type: MusicAlbum
  date published: 2019-03-15