Itsuka
type: MusicGroup
genre: j-rap
description: ITSUKA is a singer and songwriter whose musical range encompasses rock, blues, folk and country music. Biography ITSUKA (Itsuka), from Tokyo, is a multi-talented musician who can not only write lyr
popularity: 16
followers: 672
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x42ba70643b0a63733413e7fcd434018643dd1f127b62527a5663c85d43b143f9
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953724
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953724
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/8d711d55-8ed5-4f63-9b47-6ce2c9908f43.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/8d711d55-8ed5-4f63-9b47-6ce2c9908f43.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/8d711d55-8ed5-4f63-9b47-6ce2c9908f43
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-15T01:43:13Z
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 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 0x42ba70643b0a63733413e7fcd434018643dd1f127b62527a5663c85d43b143f9. Chain 2 (Bitcoin): anchored in block 953724 (2026-06-15T01:43:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8d711d55-8ed5-4f63-9b47-6ce2c9908f43.json and https://artists.proofprofile.net/proofs/artist/8d711d55-8ed5-4f63-9b47-6ce2c9908f43.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-15T01:43:13Z
album: YES
  type: MusicAlbum
  date published: 2014-02-05
album: Diary
  type: MusicAlbum
  date published: 2017-02-08
album: Diary
  type: MusicAlbum
  date published: 2017-02-08
album: a.s.e
  type: MusicAlbum
  date published: 2020-09-02
album: Good night
  type: MusicAlbum
  date published: 2022-02-20
album: Answer
  type: MusicAlbum
  date published: 2022-08-06
album: My Nonfiction (Itsuka Remix)
  type: MusicAlbum
  date published: 2022-08-24
album: Nobody but you
  type: MusicAlbum
  date published: 2022-08-26
album: Alan Walker - Legends Never Die (Itsuka Remix)
  type: MusicAlbum
  date published: 2022-09-06
album: Memory
  type: MusicAlbum
  date published: 2022-09-30
album: Magic In The Air (Special Remix)
  type: MusicAlbum
  date published: 2023-02-14
album: Forget me not
  type: MusicAlbum
  date published: 2024-06-10
album: Hitomawari
  type: MusicAlbum
  date published: 2025-03-03
album: Anatatoitsuka
  type: MusicAlbum
  date published: 2025-05-02
track: Danger Lover feat.いつか(Charisma.com)
  type: MusicRecording
  duration: PT3M36S
  duration ms: 216493
  explicit: false
  by artist: NONA REEVES
  by artist: Itsuka
  in album: MISSION
    type: MusicAlbum
    date published: 2017-10-25
  isrc code: JPWP01772207
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
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  additional property: CopyrightChainExplorerURL
    type: PropertyValue
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  additional property: OTSHash
  additional property: OTSBitcoinBlock
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    value: 956302
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/956302
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPWP01772207
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-02T03:30:09Z
  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 0x305690265acd33da5d82cf088be4a11c3c704344991f556a8a5c5e34375e9385. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPWP01772207.
    date published: 2026-07-02T03:30:09Z
  audio: Danger Lover feat.いつか(Charisma.com)
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 132.973
    additional property: Musical Key
      type: PropertyValue
      value: 0
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 5
    additional property: Danceability
      type: PropertyValue
      value: 0.708
    additional property: Energy
      type: PropertyValue
      value: 0.804
    additional property: Speechiness
      type: PropertyValue
      value: 0.048
    additional property: Acousticness
      type: PropertyValue
      value: 0.136
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.135
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.931
    additional property: Loudness (dB)
      type: PropertyValue
      value: -9.855
    additional property: Key Name
      type: PropertyValue
      value: C
    additional property: Mode Name
      type: PropertyValue
      value: Major