平松混声合唱団
type: MusicGroup
genre: choral
popularity: 32
followers: 559
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xec4db3e1bd1ecd12dcfa97b3d30c1a97ecbb478ce59bbdeadd980bbac0eacf3f
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/d8ad5850-06f9-4a8a-b492-2befaa4cf046.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/d8ad5850-06f9-4a8a-b492-2befaa4cf046.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/d8ad5850-06f9-4a8a-b492-2befaa4cf046
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-12T19:24:56Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xec4db3e1bd1ecd12dcfa97b3d30c1a97ecbb478ce59bbdeadd980bbac0eacf3f","name":"平松混声合唱団","registered_at":"2026-06-12T11:01:24Z","symbol":"NIM0277737","token_address":"0x6c6361dc68f9a603ba1cdb3ab5d0990706045080","type":"artist","uuid":"d8ad5850-06f9-4a8a-b492-2befaa4cf046"}
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec4db3e1bd1ecd12dcfa97b3d30c1a97ecbb478ce59bbdeadd980bbac0eacf3f. 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/d8ad5850-06f9-4a8a-b492-2befaa4cf046.json and https://artists.proofprofile.net/proofs/artist/d8ad5850-06f9-4a8a-b492-2befaa4cf046.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-12T19:24:56Z
  text: {"copyright_id":"0xec4db3e1bd1ecd12dcfa97b3d30c1a97ecbb478ce59bbdeadd980bbac0eacf3f","name":"平松混声合唱団","registered_at":"2026-06-12T11:01:24Z","symbol":"NIM0277737","token_address":"0x6c6361dc68f9a603ba1cdb3ab5d0990706045080","type":"artist","uuid":"d8ad5850-06f9-4a8a-b492-2befaa4cf046"}
album: 瑠璃色の地球
  type: MusicAlbum
  date published: 2001-12-01
  track: 瑠璃色の地球 (混声４部 カバー)
    type: MusicRecording
    duration: PT4M0S
    duration ms: 240026
    explicit: false
    by artist: 平松混声合唱団
    in album: 瑠璃色の地球
      type: MusicAlbum
      date published: 2001-12-01
    genre: choral
    isrc code: JPW462114117
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-21T17:41:40+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x4a49f09ab9c9fe3bd216f91cc3bd1cfe786d109b354c24ec25f74ccd1f9ae577
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 959047
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/959047
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPW462114117
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-21T20:43:56Z
    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
    subject of: OpenTimestamps Proof of Existence
      type: DigitalDocument
      encoding format: application/vnd.opentimestamps.ots
      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a49f09ab9c9fe3bd216f91cc3bd1cfe786d109b354c24ec25f74ccd1f9ae577. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:43:56Z), 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/JPW462114117.
      date published: 2026-07-21T20:43:56Z
    audio: 瑠璃色の地球 (混声４部 カバー)
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 176.469
      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: 0.141
      additional property: Energy
        type: PropertyValue
        value: 0.073
      additional property: Speechiness
        type: PropertyValue
        value: 0.04
      additional property: Acousticness
        type: PropertyValue
        value: 0.992
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.404
      additional property: Liveness
        type: PropertyValue
        value: 0.69
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.074
      additional property: Loudness (dB)
        type: PropertyValue
        value: -20.66
      additional property: Key Name
        type: PropertyValue
        value: D
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: ときめく命
  type: MusicAlbum
  date published: 2004-06-01
album: 時代
  type: MusicAlbum
  date published: 2006-08-01
album: MY WAY ～愛する歌があるから～
  type: MusicAlbum
  date published: 2006-08-01