KAKKO and TAKASHI
type: MusicGroup
genre: city pop
popularity: 4
followers: 387
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xed815d94742de3ce2f6063f92d0eab07b939d87e97b1c2f99b36bbe717046bb9
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953997
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953997
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/1d95dc6d-5dec-46b4-af6c-a283a89e88b4.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/1d95dc6d-5dec-46b4-af6c-a283a89e88b4.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/1d95dc6d-5dec-46b4-af6c-a283a89e88b4
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T20:07:57Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xed815d94742de3ce2f6063f92d0eab07b939d87e97b1c2f99b36bbe717046bb9","name":"KAKKO and TAKASHI","registered_at":"2026-06-15T23:54:45Z","symbol":"NIM0872110","token_address":"0xf963b1a706c73715d09b52de6de440cb3d1e1e03","type":"artist","uuid":"1d95dc6d-5dec-46b4-af6c-a283a89e88b4"}
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 0xed815d94742de3ce2f6063f92d0eab07b939d87e97b1c2f99b36bbe717046bb9. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1d95dc6d-5dec-46b4-af6c-a283a89e88b4.json and https://artists.proofprofile.net/proofs/artist/1d95dc6d-5dec-46b4-af6c-a283a89e88b4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T20:07:57Z
  text: {"copyright_id":"0xed815d94742de3ce2f6063f92d0eab07b939d87e97b1c2f99b36bbe717046bb9","name":"KAKKO and TAKASHI","registered_at":"2026-06-15T23:54:45Z","symbol":"NIM0872110","token_address":"0xf963b1a706c73715d09b52de6de440cb3d1e1e03","type":"artist","uuid":"1d95dc6d-5dec-46b4-af6c-a283a89e88b4"}
album: We Should be Dancing (Produced by Night Tempo)
  type: MusicAlbum
  date published: 2022-07-08
  track: We Should be Dancing (Produced by Night Tempo)
    type: MusicRecording
    duration: PT3M19S
    duration ms: 199599
    explicit: false
    by artist: KAKKO and TAKASHI
    in album: We Should be Dancing (Produced by Night Tempo)
      type: MusicAlbum
      date published: 2022-07-08
    genre: city pop
    isrc code: JPN002200094
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-04T16:20:59+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xe356125b96075acf1671fa2dc5970048cbd692a728b212a35636e9fdd0ed920c
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956725
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956725
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPN002200094
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-05T01:12:41Z
    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 0xe356125b96075acf1671fa2dc5970048cbd692a728b212a35636e9fdd0ed920c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/JPN002200094.
      date published: 2026-07-05T01:12:41Z
    audio: We Should be Dancing (Produced by Night Tempo)
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 119.997
      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: 0.694
      additional property: Energy
        type: PropertyValue
        value: 0.914
      additional property: Speechiness
        type: PropertyValue
        value: 0.065
      additional property: Acousticness
        type: PropertyValue
        value: 0.08
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.062
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.882
      additional property: Loudness (dB)
        type: PropertyValue
        value: -5.962
      additional property: Key Name
        type: PropertyValue
        value: F
      additional property: Mode Name
        type: PropertyValue
        value: Major