Kurofune
type: MusicGroup
genre: acid jazz
genre: math rock
popularity: 5
followers: 486
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xa65d5dc346135926f9382f29363a1977eaa48f1adf9bbc63d33ab5570942e1c1
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953954
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953954
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/254d0658-2c73-4fb4-900d-fa53248d6d4a.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/254d0658-2c73-4fb4-900d-fa53248d6d4a.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/254d0658-2c73-4fb4-900d-fa53248d6d4a
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T14:18:37Z
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 0xa65d5dc346135926f9382f29363a1977eaa48f1adf9bbc63d33ab5570942e1c1. Chain 2 (Bitcoin): anchored in block 953954 (2026-06-16T14:18:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/254d0658-2c73-4fb4-900d-fa53248d6d4a.json and https://artists.proofprofile.net/proofs/artist/254d0658-2c73-4fb4-900d-fa53248d6d4a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T14:18:37Z
album: Crossover
  type: MusicAlbum
  date published: 2014-09-07
album: CROSSOVER
  type: MusicAlbum
  date published: 2014-09-07
album: BREAKTHROUGH
  type: MusicAlbum
  date published: 2015-12-02
  track: AFFIRMATION
    type: MusicRecording
    duration: PT6M2S
    duration ms: 362253
    explicit: false
    by artist: Kurofune
    in album: BREAKTHROUGH
      type: MusicAlbum
      date published: 2015-12-02
    genre: acid jazz
    genre: math rock
    isrc code: JPZ921511536
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-22T11:34:24+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xd8b74ce7021753161bcd53ee8e7bb0e3458e0a921fe6f656107da907650a29f1
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 959128
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/959128
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPZ921511536
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-22T12:33:25Z
    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 0xd8b74ce7021753161bcd53ee8e7bb0e3458e0a921fe6f656107da907650a29f1. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/JPZ921511536.
      date published: 2026-07-22T12:33:25Z
    audio: AFFIRMATION
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 113.995
      additional property: Musical Key
        type: PropertyValue
        value: 5
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.69
      additional property: Energy
        type: PropertyValue
        value: 0.783
      additional property: Speechiness
        type: PropertyValue
        value: 0.03
      additional property: Acousticness
        type: PropertyValue
        value: 0.212
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.923
      additional property: Liveness
        type: PropertyValue
        value: 0.097
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.855
      additional property: Loudness (dB)
        type: PropertyValue
        value: -6.846
      additional property: Key Name
        type: PropertyValue
        value: F
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Journey
  type: MusicAlbum
  date published: 2018-10-10
album: YANBARU
  type: MusicAlbum
  date published: 2019-11-06