中村佳紀
type: MusicGroup
popularity: 26
followers: 585
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x9cf1eb42e5ff56da828f05f5bd47f056d33f3d184afa9093b25a2ad01152f21f
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953407
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953407
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/3f0c291a-6df8-4508-9bb4-15745fc29272.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/3f0c291a-6df8-4508-9bb4-15745fc29272.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/3f0c291a-6df8-4508-9bb4-15745fc29272
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-12T19:24:56Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x9cf1eb42e5ff56da828f05f5bd47f056d33f3d184afa9093b25a2ad01152f21f","name":"中村佳紀","registered_at":"2026-06-11T17:27:30Z","symbol":"NIM0082114","token_address":"0x7cf8b60c10f478d7c1865946f4488f35950ee279","type":"artist","uuid":"3f0c291a-6df8-4508-9bb4-15745fc29272"}
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 0x9cf1eb42e5ff56da828f05f5bd47f056d33f3d184afa9093b25a2ad01152f21f. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3f0c291a-6df8-4508-9bb4-15745fc29272.json and https://artists.proofprofile.net/proofs/artist/3f0c291a-6df8-4508-9bb4-15745fc29272.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-12T19:24:56Z
  text: {"copyright_id":"0x9cf1eb42e5ff56da828f05f5bd47f056d33f3d184afa9093b25a2ad01152f21f","name":"中村佳紀","registered_at":"2026-06-11T17:27:30Z","symbol":"NIM0082114","token_address":"0x7cf8b60c10f478d7c1865946f4488f35950ee279","type":"artist","uuid":"3f0c291a-6df8-4508-9bb4-15745fc29272"}
album: Police and Prosecutor, sometimes with Judge (Original TV Series Soundtrack)
  type: MusicAlbum
  date published: 2023-06-14
  track: DANDELION piano ver.
    type: MusicRecording
    duration: PT2M31S
    duration ms: 151213
    explicit: false
    by artist: Sota Hanamura
    by artist: MEG.ME
    by artist: Louis
    by artist: Takahiro Misawa
    in album: Police and Prosecutor, sometimes with Judge (Original TV Series Soundtrack)
      type: MusicAlbum
      date published: 2023-06-14
    popularity: 2
    isrc code: JPVP02307032
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xc8478fe677ead054ba0e8d76ffa7482fc097f164c04fc292f3a864073c979c3c
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 960344
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/960344
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPVP02307032
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-31T04:14:58Z
    additional property: OTSVerifyInstructions
      type: PropertyValue
      value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 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. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp 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 0xc8478fe677ead054ba0e8d76ffa7482fc097f164c04fc292f3a864073c979c3c. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPVP02307032.
      date published: 2026-07-31T04:14:58Z
    audio: DANDELION piano ver.
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 114.576
      additional property: Musical Key
        type: PropertyValue
        value: 4
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 5
      additional property: Danceability
        type: PropertyValue
        value: 0.544
      additional property: Energy
        type: PropertyValue
        value: 0.227
      additional property: Speechiness
        type: PropertyValue
        value: 0.046
      additional property: Acousticness
        type: PropertyValue
        value: 0.979
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.909
      additional property: Liveness
        type: PropertyValue
        value: 0.097
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.207
      additional property: Loudness (dB)
        type: PropertyValue
        value: -21.048
      additional property: Key Name
        type: PropertyValue
        value: E
      additional property: Mode Name
        type: PropertyValue
        value: Minor