Kumasu Project
type: MusicGroup
popularity: 4
followers: 19
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x480d9df656c0082d848af07e84477e82a8555ecfe715c8a932ae2b18473d465a
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954549
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954549
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/a88c36a1-1312-4d1e-b475-ada1811003e8.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/a88c36a1-1312-4d1e-b475-ada1811003e8.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/a88c36a1-1312-4d1e-b475-ada1811003e8
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T10:56:20Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x480d9df656c0082d848af07e84477e82a8555ecfe715c8a932ae2b18473d465a","name":"Kumasu Project","registered_at":"2026-06-20T08:49:18Z","symbol":"NIM1569957","token_address":"0xc9d9cbafde3c6fd0d9492e0d1bdc82d5260e9640","type":"artist","uuid":"a88c36a1-1312-4d1e-b475-ada1811003e8"}
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 0x480d9df656c0082d848af07e84477e82a8555ecfe715c8a932ae2b18473d465a. Chain 2 (Bitcoin): anchored in block 954549 (2026-06-20T10:56:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a88c36a1-1312-4d1e-b475-ada1811003e8.json and https://artists.proofprofile.net/proofs/artist/a88c36a1-1312-4d1e-b475-ada1811003e8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T10:56:20Z
  text: {"copyright_id":"0x480d9df656c0082d848af07e84477e82a8555ecfe715c8a932ae2b18473d465a","name":"Kumasu Project","registered_at":"2026-06-20T08:49:18Z","symbol":"NIM1569957","token_address":"0xc9d9cbafde3c6fd0d9492e0d1bdc82d5260e9640","type":"artist","uuid":"a88c36a1-1312-4d1e-b475-ada1811003e8"}
album: FantasySound
  type: MusicAlbum
  date published: 2022-05-10
album: 星の標
  type: MusicAlbum
  date published: 2023-01-25
album: 彗星飛行計画
  type: MusicAlbum
  date published: 2023-09-01
album: Heroic Epic
  type: MusicAlbum
  date published: 2024-10-30
  track: 朝空
    type: MusicRecording
    duration: PT1M54S
    duration ms: 114375
    explicit: false
    by artist: Kumasu Project
    in album: Heroic Epic
      type: MusicAlbum
      date published: 2024-10-30
    isrc code: JPW792421560
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-20T21:17:14+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x288c810d47826367cd574c0b077d67b72e8d8a90d57fae19ecff5662f45b198a
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958935
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958935
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPW792421560
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-20T22:08:19Z
    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 0x288c810d47826367cd574c0b077d67b72e8d8a90d57fae19ecff5662f45b198a. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/JPW792421560.
      date published: 2026-07-20T22:08:19Z
    audio: 朝空
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 179.982
      additional property: Musical Key
        type: PropertyValue
        value: 2
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.341
      additional property: Energy
        type: PropertyValue
        value: 0.605
      additional property: Speechiness
        type: PropertyValue
        value: 0.033
      additional property: Acousticness
        type: PropertyValue
        value: 0.257
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.683
      additional property: Liveness
        type: PropertyValue
        value: 0.097
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.375
      additional property: Loudness (dB)
        type: PropertyValue
        value: -13.469
      additional property: Key Name
        type: PropertyValue
        value: D
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Stargazing
  type: MusicAlbum
  date published: 2024-10-31