kareru
type: MusicGroup
popularity: 6
followers: 1153
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x292f3ff06c5b459f0b472e6641e8d0901d5957dde5c74fc4c100f50f8335a530
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954693
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954693
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/e499cb13-992f-4aa8-a069-f008183b2d25.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/e499cb13-992f-4aa8-a069-f008183b2d25.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/e499cb13-992f-4aa8-a069-f008183b2d25
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T11:50:32Z
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 0x292f3ff06c5b459f0b472e6641e8d0901d5957dde5c74fc4c100f50f8335a530. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e499cb13-992f-4aa8-a069-f008183b2d25.json and https://artists.proofprofile.net/proofs/artist/e499cb13-992f-4aa8-a069-f008183b2d25.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T11:50:32Z
album: Music does not die
  type: MusicAlbum
  date published: 2021-11-20
album: 音楽は死なない
  type: MusicAlbum
  date published: 2021-11-20
album: Summer ice
  type: MusicAlbum
  date published: 2022-03-15
album: 夏の氷
  type: MusicAlbum
  date published: 2022-03-15
album: Premonition of summer
  type: MusicAlbum
  date published: 2022-04-22
album: 夏の予感
  type: MusicAlbum
  date published: 2022-04-22
album: 休日とモカ
  type: MusicAlbum
  date published: 2022-05-13
album: Holidays and mocha
  type: MusicAlbum
  date published: 2022-05-13
album: Cool in the evening
  type: MusicAlbum
  date published: 2022-05-23
album: 夕、涼しげに
  type: MusicAlbum
  date published: 2022-05-23
album: あの夏空へ
  type: MusicAlbum
  date published: 2022-06-06
album: To that summer sky
  type: MusicAlbum
  date published: 2022-06-06
album: Natsumeku
  type: MusicAlbum
  date published: 2022-06-21
album: 夏めく
  type: MusicAlbum
  date published: 2022-06-21
album: Summer way home
  type: MusicAlbum
  date published: 2022-07-07
album: 夏の帰り道
  type: MusicAlbum
  date published: 2022-07-07
album: 晩夏の夢
  type: MusicAlbum
  date published: 2022-08-31
album: 春は曖昧
  type: MusicAlbum
  date published: 2023-01-18
  track: 春は曖昧
    type: MusicRecording
    duration: PT1M58S
    duration ms: 118768
    explicit: false
    by artist: kareru
    in album: 春は曖昧
      type: MusicAlbum
      date published: 2023-01-18
    isrc code: JPZ922212262
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-21T07:33:06+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x239886a0788535cfc14d7b22c68166060a677911204f12f9fdcf7b7f12c07726
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958985
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958985
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPZ922212262
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-21T08:39:15Z
    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 0x239886a0788535cfc14d7b22c68166060a677911204f12f9fdcf7b7f12c07726. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/JPZ922212262.
      date published: 2026-07-21T08:39:15Z
    audio: 春は曖昧
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 162.105
      additional property: Musical Key
        type: PropertyValue
        value: 0
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.418
      additional property: Energy
        type: PropertyValue
        value: 0.4
      additional property: Speechiness
        type: PropertyValue
        value: 0.046
      additional property: Acousticness
        type: PropertyValue
        value: 0.802
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.812
      additional property: Liveness
        type: PropertyValue
        value: 0.106
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.191
      additional property: Loudness (dB)
        type: PropertyValue
        value: -12.379
      additional property: Key Name
        type: PropertyValue
        value: C
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: white peach butterfly
  type: MusicAlbum
  date published: 2023-02-22
album: 白桃蝶
  type: MusicAlbum
  date published: 2023-02-22
album: I know the color of life
  type: MusicAlbum
  date published: 2023-08-16
album: 灯明
  type: MusicAlbum
  date published: 2025-09-01