関口 和之 featuring 竹中 直人
type: MusicGroup
popularity: 2
followers: 134
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xaaedd6b746d69186de3717249ced558e30231903493274f9998b9b0dcce8bdec
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954742
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954742
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/fe76a680-cabd-47f2-a930-e18753602c15.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/fe76a680-cabd-47f2-a930-e18753602c15.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/fe76a680-cabd-47f2-a930-e18753602c15
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T20:46:40Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xaaedd6b746d69186de3717249ced558e30231903493274f9998b9b0dcce8bdec","name":"関口 和之 featuring 竹中 直人","registered_at":"2026-06-21T18:20:29Z","symbol":"NIM1999691","token_address":"0xce0e116970ff99c436dcfbfad4a0107a6d2fb553","type":"artist","uuid":"fe76a680-cabd-47f2-a930-e18753602c15"}
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaedd6b746d69186de3717249ced558e30231903493274f9998b9b0dcce8bdec. Chain 2 (Bitcoin): anchored in block 954742 (2026-06-21T20:46:40Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fe76a680-cabd-47f2-a930-e18753602c15.json and https://artists.proofprofile.net/proofs/artist/fe76a680-cabd-47f2-a930-e18753602c15.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T20:46:40Z
  text: {"copyright_id":"0xaaedd6b746d69186de3717249ced558e30231903493274f9998b9b0dcce8bdec","name":"関口 和之 featuring 竹中 直人","registered_at":"2026-06-21T18:20:29Z","symbol":"NIM1999691","token_address":"0xce0e116970ff99c436dcfbfad4a0107a6d2fb553","type":"artist","uuid":"fe76a680-cabd-47f2-a930-e18753602c15"}
album: 口笛とウクレレ(feat. 竹中 直人)
  type: MusicAlbum
  date published: 2000-11-22