松村和子
type: MusicGroup
genre: enka
genre: kayokyoku
popularity: 25
followers: 1402
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x3b716eedfff68fdbfc7e6d51f48a67cd1e93e1011f97de1aa80728fd9d4d67ce
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/8a3a3311-d732-4a8d-ae8d-c3c6b3c47b3e.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/8a3a3311-d732-4a8d-ae8d-c3c6b3c47b3e.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/8a3a3311-d732-4a8d-ae8d-c3c6b3c47b3e
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-12T19:24:56Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x3b716eedfff68fdbfc7e6d51f48a67cd1e93e1011f97de1aa80728fd9d4d67ce","name":"松村和子","registered_at":"2026-06-12T03:55:19Z","symbol":"NIM0179268","token_address":"0x9183dd282a0827d0396b89c501e0573b3f58822f","type":"artist","uuid":"8a3a3311-d732-4a8d-ae8d-c3c6b3c47b3e"}
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 0x3b716eedfff68fdbfc7e6d51f48a67cd1e93e1011f97de1aa80728fd9d4d67ce. 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/8a3a3311-d732-4a8d-ae8d-c3c6b3c47b3e.json and https://artists.proofprofile.net/proofs/artist/8a3a3311-d732-4a8d-ae8d-c3c6b3c47b3e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-12T19:24:56Z
  text: {"copyright_id":"0x3b716eedfff68fdbfc7e6d51f48a67cd1e93e1011f97de1aa80728fd9d4d67ce","name":"松村和子","registered_at":"2026-06-12T03:55:19Z","symbol":"NIM0179268","token_address":"0x9183dd282a0827d0396b89c501e0573b3f58822f","type":"artist","uuid":"8a3a3311-d732-4a8d-ae8d-c3c6b3c47b3e"}
album: 松村和子 １
  type: MusicAlbum
  date published: 2008-10-01
album: 風の津軽
  type: MusicAlbum
  date published: 2008-10-08
album: 望郷ながれ歌/明日咲く
  type: MusicAlbum
  date published: 2020-08-26
  track: 望郷ながれ歌
    type: MusicRecording
    duration: PT5M2S
    duration ms: 302840
    explicit: false
    by artist: 松村和子
    in album: 望郷ながれ歌/明日咲く
      type: MusicAlbum
      date published: 2020-08-26
    genre: enka
    genre: kayokyoku
    isrc code: JPTK02004670
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-20T10:32:09+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x33e7367486cc31ef646efc883b8855ba6fcff6baa3464c78ebf23023cfd21938
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958867
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958867
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPTK02004670
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-20T11:08:30Z
    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 0x33e7367486cc31ef646efc883b8855ba6fcff6baa3464c78ebf23023cfd21938. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/JPTK02004670.
      date published: 2026-07-20T11:08:30Z
    audio: 望郷ながれ歌
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 133.157
      additional property: Musical Key
        type: PropertyValue
        value: 4
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.502
      additional property: Energy
        type: PropertyValue
        value: 0.75
      additional property: Speechiness
        type: PropertyValue
        value: 0.04
      additional property: Acousticness
        type: PropertyValue
        value: 0.448
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.281
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.578
      additional property: Loudness (dB)
        type: PropertyValue
        value: -4.35
      additional property: Key Name
        type: PropertyValue
        value: E
      additional property: Mode Name
        type: PropertyValue
        value: Minor