YUUKI KAZUAKI
type: MusicGroup
genre: enka
genre: kayokyoku
popularity: 6
followers: 47
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xac68bf96a8269bf8b1398896233d5b204910cff5dc690260d545706e3f9a1791
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954066
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954066
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/6cefbb66-491f-471c-be8a-6bcf00740816.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/6cefbb66-491f-471c-be8a-6bcf00740816.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/6cefbb66-491f-471c-be8a-6bcf00740816
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:11:48Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xac68bf96a8269bf8b1398896233d5b204910cff5dc690260d545706e3f9a1791","name":"YUUKI KAZUAKI","registered_at":"2026-06-17T03:38:26Z","symbol":"NIM1269185","token_address":"0x7d5678aa6f82224b313b171e4dbac8332aa2e98a","type":"artist","uuid":"6cefbb66-491f-471c-be8a-6bcf00740816"}
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 0xac68bf96a8269bf8b1398896233d5b204910cff5dc690260d545706e3f9a1791. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6cefbb66-491f-471c-be8a-6bcf00740816.json and https://artists.proofprofile.net/proofs/artist/6cefbb66-491f-471c-be8a-6bcf00740816.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
  text: {"copyright_id":"0xac68bf96a8269bf8b1398896233d5b204910cff5dc690260d545706e3f9a1791","name":"YUUKI KAZUAKI","registered_at":"2026-06-17T03:38:26Z","symbol":"NIM1269185","token_address":"0x7d5678aa6f82224b313b171e4dbac8332aa2e98a","type":"artist","uuid":"6cefbb66-491f-471c-be8a-6bcf00740816"}
album: 金沢の夜
  type: MusicAlbum
  date published: 2022-02-02
album: 金沢片町、夜8時
  type: MusicAlbum
  date published: 2025-06-04
  track: 金沢片町、夜8時
    type: MusicRecording
    duration: PT4M57S
    duration ms: 297293
    explicit: false
    by artist: YUUKI KAZUAKI
    in album: 金沢片町、夜8時
      type: MusicAlbum
      date published: 2025-06-04
    genre: enka
    genre: kayokyoku
    isrc code: JPTK02501410
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-13T00:16:03+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x0004fbbbeefeeead71d70fabe30992efec3f38b3feb8f0effbf4b1fe4ea7e6d9
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 957780
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/957780
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPTK02501410
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-13T00:36:44Z
    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
    subject of: OpenTimestamps Proof of Existence
      type: DigitalDocument
      encoding format: application/vnd.opentimestamps.ots
      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0004fbbbeefeeead71d70fabe30992efec3f38b3feb8f0effbf4b1fe4ea7e6d9. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/JPTK02501410.
      date published: 2026-07-13T00:36:44Z
    audio: 金沢片町、夜8時
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 111.981
      additional property: Musical Key
        type: PropertyValue
        value: 1
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.61
      additional property: Energy
        type: PropertyValue
        value: 0.677
      additional property: Speechiness
        type: PropertyValue
        value: 0.027
      additional property: Acousticness
        type: PropertyValue
        value: 0.389
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.318
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.714
      additional property: Loudness (dB)
        type: PropertyValue
        value: -4.243
      additional property: Key Name
        type: PropertyValue
        value: C#
      additional property: Mode Name
        type: PropertyValue
        value: Minor