Kaori Watanabe
type: MusicGroup
genre: lullaby
popularity: 26
followers: 493
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x4177c390f84ce318ae004ba393d4aa854c45710f96e047d50ddc2d41473be38d
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953407
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953407
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/e39895b5-2d9a-4328-83a6-42a98bef7f36.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/e39895b5-2d9a-4328-83a6-42a98bef7f36.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/e39895b5-2d9a-4328-83a6-42a98bef7f36
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-12T19:24:56Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x4177c390f84ce318ae004ba393d4aa854c45710f96e047d50ddc2d41473be38d","name":"Kaori Watanabe","registered_at":"2026-06-12T12:09:40Z","symbol":"NIM0293566","token_address":"0x3f03c182a21d14b0364f268fa5ebd080bb148e20","type":"artist","uuid":"e39895b5-2d9a-4328-83a6-42a98bef7f36"}
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 0x4177c390f84ce318ae004ba393d4aa854c45710f96e047d50ddc2d41473be38d. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e39895b5-2d9a-4328-83a6-42a98bef7f36.json and https://artists.proofprofile.net/proofs/artist/e39895b5-2d9a-4328-83a6-42a98bef7f36.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-12T19:24:56Z
  text: {"copyright_id":"0x4177c390f84ce318ae004ba393d4aa854c45710f96e047d50ddc2d41473be38d","name":"Kaori Watanabe","registered_at":"2026-06-12T12:09:40Z","symbol":"NIM0293566","token_address":"0x3f03c182a21d14b0364f268fa5ebd080bb148e20","type":"artist","uuid":"e39895b5-2d9a-4328-83a6-42a98bef7f36"}
track: ちょうちょう
  type: MusicRecording
  duration: PT1M21S
  duration ms: 81813
  explicit: false
  by artist: Kaori Watanabe
  by artist: 世田谷ジュニア合唱団
  in album: 入園・入学のうた ベスト
    type: MusicAlbum
    date published: 2014-03-19
  isrc code: JPVI00439850
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x9afe3fd6a40a4d51d798e59d4997e93b20799e149607929d998e219ecde91f08
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 960362
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/960362
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPVI00439850
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-31T06:58:00Z
  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 0x9afe3fd6a40a4d51d798e59d4997e93b20799e149607929d998e219ecde91f08. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/JPVI00439850.
    date published: 2026-07-31T06:58:00Z
  audio: ちょうちょう
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 170.24
    additional property: Musical Key
      type: PropertyValue
      value: 5
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 5
    additional property: Danceability
      type: PropertyValue
      value: 0.585
    additional property: Energy
      type: PropertyValue
      value: 0.316
    additional property: Speechiness
      type: PropertyValue
      value: 0.029
    additional property: Acousticness
      type: PropertyValue
      value: 0.764
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.161
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.84
    additional property: Loudness (dB)
      type: PropertyValue
      value: -13.558
    additional property: Key Name
      type: PropertyValue
      value: F
    additional property: Mode Name
      type: PropertyValue
      value: Major