niKu
type: MusicGroup
genre: j-pop
popularity: 38
followers: 20306
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x1533516d9e442d3105fef730651c8e4b398ef58ea4c2186f552151d196960145
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/5d59ef2d-9e64-4be1-a171-3822d6dab19e.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/5d59ef2d-9e64-4be1-a171-3822d6dab19e.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/5d59ef2d-9e64-4be1-a171-3822d6dab19e
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-12T19:24:56Z
additional property: OTSCanonicalRecord
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 0x1533516d9e442d3105fef730651c8e4b398ef58ea4c2186f552151d196960145. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5d59ef2d-9e64-4be1-a171-3822d6dab19e.json and https://artists.proofprofile.net/proofs/artist/5d59ef2d-9e64-4be1-a171-3822d6dab19e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-12T21:20:00Z
album: シオン
  type: MusicAlbum
  date published: 2021-06-05
album: Sion
  type: MusicAlbum
  date published: 2021-06-05
album: 灯火
  type: MusicAlbum
  date published: 2021-08-29
album: Lights
  type: MusicAlbum
  date published: 2021-08-29
album: オーライア
  type: MusicAlbum
  date published: 2021-10-10
album: Alligher
  type: MusicAlbum
  date published: 2021-10-10
album: Lazy person
  type: MusicAlbum
  date published: 2022-02-09
album: なまけもの
  type: MusicAlbum
  date published: 2022-02-09
album: サクラメルト (feat. さなり)
  type: MusicAlbum
  date published: 2022-04-29
album: Melts in the cherry blossoms (feat. sanari)
  type: MusicAlbum
  date published: 2022-04-29
album: チャイホ
  type: MusicAlbum
  date published: 2022-07-29
album: Gotcha
  type: MusicAlbum
  date published: 2022-07-29
album: Food King
  type: MusicAlbum
  date published: 2022-09-10
album: 食キング
  type: MusicAlbum
  date published: 2022-09-10
album: DAHA (feat. mido)
  type: MusicAlbum
  date published: 2025-04-29
album: DAHA (feat. mido)
  type: MusicAlbum
  date published: 2025-04-29
album: にくたらしいわ (feat. 桜あおい)
  type: MusicAlbum
  date published: 2025-09-14
album: Hateful (feat. Aoi Sakura)
  type: MusicAlbum
  date published: 2025-09-14
  track: Hateful (feat. Aoi Sakura)
    type: MusicRecording
    duration: PT3M29S
    duration ms: 209638
    explicit: false
    by artist: niKu
    in album: Hateful (feat. Aoi Sakura)
      type: MusicAlbum
      date published: 2025-09-14
    genre: j-pop
    isrc code: QT66J2513530
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-15T12:36:58+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xb30c52284f10b9575ea5b6142f3fb4686edd859a7d22487bb85221726785529b
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958157
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958157
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QT66J2513530
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-15T15:39:45Z
    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 0xb30c52284f10b9575ea5b6142f3fb4686edd859a7d22487bb85221726785529b. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:39:45Z), 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/QT66J2513530.
      date published: 2026-07-15T15:39:45Z
    audio: Hateful (feat. Aoi Sakura)
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 166.056
      additional property: Musical Key
        type: PropertyValue
        value: 7
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.595
      additional property: Energy
        type: PropertyValue
        value: 0.855
      additional property: Speechiness
        type: PropertyValue
        value: 0.049
      additional property: Acousticness
        type: PropertyValue
        value: 0.022
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.283
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.543
      additional property: Loudness (dB)
        type: PropertyValue
        value: -5.616
      additional property: Key Name
        type: PropertyValue
        value: G
      additional property: Mode Name
        type: PropertyValue
        value: Major