大井健
type: MusicGroup
genre: japanese classical
popularity: 10
followers: 516
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x6b19b6ed6c024d8512d0101a297bacc48b5039844c2f6c1e11aac48905031456
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954066
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954066
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/5a9e93fc-5cd4-4b35-8c48-3caa9d81360e.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/5a9e93fc-5cd4-4b35-8c48-3caa9d81360e.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/5a9e93fc-5cd4-4b35-8c48-3caa9d81360e
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:11:48Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x6b19b6ed6c024d8512d0101a297bacc48b5039844c2f6c1e11aac48905031456","name":"大井健","registered_at":"2026-06-16T21:10:04Z","symbol":"NIM1176541","token_address":"0x4d752c81363ac4dfde154b11d361c46f1e208af3","type":"artist","uuid":"5a9e93fc-5cd4-4b35-8c48-3caa9d81360e"}
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 0x6b19b6ed6c024d8512d0101a297bacc48b5039844c2f6c1e11aac48905031456. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5a9e93fc-5cd4-4b35-8c48-3caa9d81360e.json and https://artists.proofprofile.net/proofs/artist/5a9e93fc-5cd4-4b35-8c48-3caa9d81360e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
  text: {"copyright_id":"0x6b19b6ed6c024d8512d0101a297bacc48b5039844c2f6c1e11aac48905031456","name":"大井健","registered_at":"2026-06-16T21:10:04Z","symbol":"NIM1176541","token_address":"0x4d752c81363ac4dfde154b11d361c46f1e208af3","type":"artist","uuid":"5a9e93fc-5cd4-4b35-8c48-3caa9d81360e"}
album: Piano Love
  type: MusicAlbum
  date published: 2015-07-15
album: Piano LoveⅡ
  type: MusicAlbum
  date published: 2017-02-08
  track: 明日
    type: MusicRecording
    duration: PT4M26S
    duration ms: 266586
    explicit: false
    by artist: 大井健
    in album: Piano LoveⅡ
      type: MusicAlbum
      date published: 2017-02-08
    genre: japanese classical
    isrc code: JPKI01620963
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-15T17:33:01+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xd19571491eaf0a0db33ea3e31e01909e7300b2f86aad8aaedc3ece1426a0dd88
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958180
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958180
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPKI01620963
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-15T17:59:52Z
    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 0xd19571491eaf0a0db33ea3e31e01909e7300b2f86aad8aaedc3ece1426a0dd88. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/JPKI01620963.
      date published: 2026-07-15T17:59:52Z
    audio: 明日
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 56.969
      additional property: Musical Key
        type: PropertyValue
        value: 7
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.371
      additional property: Energy
        type: PropertyValue
        value: 0.067
      additional property: Speechiness
        type: PropertyValue
        value: 0.034
      additional property: Acousticness
        type: PropertyValue
        value: 0.993
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.897
      additional property: Liveness
        type: PropertyValue
        value: 0.189
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.11
      additional property: Loudness (dB)
        type: PropertyValue
        value: -19.816
      additional property: Key Name
        type: PropertyValue
        value: G
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: reBUILD
  type: MusicAlbum
  date published: 2021-06-02