九城伸明
type: MusicGroup
popularity: 3
followers: 614
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x525ed1ea52db167fd4fe839ccf9b30c0ec14ec2e435262dbeea34dc91fef0edd
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953991
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953991
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/2e90d39a-5e24-4c8f-99b1-cbc7fa238410.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/2e90d39a-5e24-4c8f-99b1-cbc7fa238410.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/2e90d39a-5e24-4c8f-99b1-cbc7fa238410
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T18:47:23Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x525ed1ea52db167fd4fe839ccf9b30c0ec14ec2e435262dbeea34dc91fef0edd","name":"九城伸明","registered_at":"2026-06-16T05:51:01Z","symbol":"NIM0957218","token_address":"0x1df7d8a0668c9bb264868d16fb77f32851520a7a","type":"artist","uuid":"2e90d39a-5e24-4c8f-99b1-cbc7fa238410"}
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 0x525ed1ea52db167fd4fe839ccf9b30c0ec14ec2e435262dbeea34dc91fef0edd. Chain 2 (Bitcoin): anchored in block 953991 (2026-06-16T18:47:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2e90d39a-5e24-4c8f-99b1-cbc7fa238410.json and https://artists.proofprofile.net/proofs/artist/2e90d39a-5e24-4c8f-99b1-cbc7fa238410.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T18:47:23Z
  text: {"copyright_id":"0x525ed1ea52db167fd4fe839ccf9b30c0ec14ec2e435262dbeea34dc91fef0edd","name":"九城伸明","registered_at":"2026-06-16T05:51:01Z","symbol":"NIM0957218","token_address":"0x1df7d8a0668c9bb264868d16fb77f32851520a7a","type":"artist","uuid":"2e90d39a-5e24-4c8f-99b1-cbc7fa238410"}
album: ピエロンリー
  type: MusicAlbum
  date published: 2015-04-08
  track: ピエロンリー
    type: MusicRecording
    duration: PT4M14S
    duration ms: 254615
    explicit: false
    by artist: 九城伸明
    in album: ピエロンリー
      type: MusicAlbum
      date published: 2015-04-08
    isrc code: JPN001500131
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-17T06:53:53+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xc25eeae31ed36c739dd17ea0a7c7dcef8ef9e7f16f0b050bab21c2e3d0ef1697
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958380
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958380
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPN001500131
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-17T07:07:02Z
    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 0xc25eeae31ed36c739dd17ea0a7c7dcef8ef9e7f16f0b050bab21c2e3d0ef1697. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/JPN001500131.
      date published: 2026-07-17T07:07:02Z
    audio: ピエロンリー
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 78.289
      additional property: Musical Key
        type: PropertyValue
        value: 4
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.465
      additional property: Energy
        type: PropertyValue
        value: 0.364
      additional property: Speechiness
        type: PropertyValue
        value: 0.035
      additional property: Acousticness
        type: PropertyValue
        value: 0.905
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.069
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.115
      additional property: Loudness (dB)
        type: PropertyValue
        value: -13.851
      additional property: Key Name
        type: PropertyValue
        value: E
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: ピエロンリー
  type: MusicAlbum
  date published: 2015-04-08