Arata Iiyoshi Hideki Sakamoto Yoshihiro Maeda
type: MusicGroup
popularity: 2
followers: 1
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xa3b684c1dce3b3abd58663c766b473e6695943c9749feae7e5576fe9c1e1ba20
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954728
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954728
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/f827c520-7526-47a6-83b8-958fb56f4d80.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/f827c520-7526-47a6-83b8-958fb56f4d80.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/f827c520-7526-47a6-83b8-958fb56f4d80
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T18:08:38Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xa3b684c1dce3b3abd58663c766b473e6695943c9749feae7e5576fe9c1e1ba20","name":"Arata Iiyoshi Hideki Sakamoto Yoshihiro Maeda","registered_at":"2026-06-21T15:46:12Z","symbol":"NIM1963894","token_address":"0xe9bd02a7b2b9bb5ed8842fcca3b8c830253a864d","type":"artist","uuid":"f827c520-7526-47a6-83b8-958fb56f4d80"}
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 0xa3b684c1dce3b3abd58663c766b473e6695943c9749feae7e5576fe9c1e1ba20. Chain 2 (Bitcoin): anchored in block 954728 (2026-06-21T18:08:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f827c520-7526-47a6-83b8-958fb56f4d80.json and https://artists.proofprofile.net/proofs/artist/f827c520-7526-47a6-83b8-958fb56f4d80.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T18:08:38Z
  text: {"copyright_id":"0xa3b684c1dce3b3abd58663c766b473e6695943c9749feae7e5576fe9c1e1ba20","name":"Arata Iiyoshi Hideki Sakamoto Yoshihiro Maeda","registered_at":"2026-06-21T15:46:12Z","symbol":"NIM1963894","token_address":"0xe9bd02a7b2b9bb5ed8842fcca3b8c830253a864d","type":"artist","uuid":"f827c520-7526-47a6-83b8-958fb56f4d80"}