松前 ひろ子
type: MusicGroup
genre: enka
genre: kayokyoku
popularity: 3
followers: 29
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xc0a926ae08c253d9b3c94cfb24a1fab3c74028fc611ccb4b5eddd8eb31d92477
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953857
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953857
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/02363639-60b6-4277-8241-1376ba130f0a.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/02363639-60b6-4277-8241-1376ba130f0a.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/02363639-60b6-4277-8241-1376ba130f0a
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-15T23:34:38Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xc0a926ae08c253d9b3c94cfb24a1fab3c74028fc611ccb4b5eddd8eb31d92477","name":"松前 ひろ子","registered_at":"2026-06-15T14:26:34Z","symbol":"NIM0736544","token_address":"0xa1c081b48cea392a635ff35ca9ff5bfad90f4053","type":"artist","uuid":"02363639-60b6-4277-8241-1376ba130f0a"}
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 0xc0a926ae08c253d9b3c94cfb24a1fab3c74028fc611ccb4b5eddd8eb31d92477. Chain 2 (Bitcoin): anchored in block 953877 (2026-06-16T02:39:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/02363639-60b6-4277-8241-1376ba130f0a.json and https://artists.proofprofile.net/proofs/artist/02363639-60b6-4277-8241-1376ba130f0a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T02:39:16Z
  text: {"copyright_id":"0xc0a926ae08c253d9b3c94cfb24a1fab3c74028fc611ccb4b5eddd8eb31d92477","name":"松前 ひろ子","registered_at":"2026-06-15T14:26:34Z","symbol":"NIM0736544","token_address":"0xa1c081b48cea392a635ff35ca9ff5bfad90f4053","type":"artist","uuid":"02363639-60b6-4277-8241-1376ba130f0a"}
album: 恋一夜
  type: MusicAlbum
  date published: 1984-06-21
album: 函館慕情
  type: MusicAlbum
  date published: 1985-09-21
album: 出船酒場
  type: MusicAlbum
  date published: 1987-06-21
album: あなたとならば
  type: MusicAlbum
  date published: 1988-09-01
album: 初孫
  type: MusicAlbum
  date published: 1991-09-01
album: 祝いしぐれ
  type: MusicAlbum
  date published: 1992-08-22
  track: 祝いしぐれ
    type: MusicRecording
    duration: PT4M58S
    duration ms: 298666
    explicit: false
    by artist: 松前 ひろ子
    in album: 祝いしぐれ
      type: MusicAlbum
      date published: 1992-08-22
    genre: enka
    genre: kayokyoku
    isrc code: JPSR09003720
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-19T19:40:52+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xdaedc33c3e704fb14aa7c9d5a971086c564b711ff0c883ed87af6f295500e555
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958774
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958774
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPSR09003720
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-19T22:43:29Z
    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 0xdaedc33c3e704fb14aa7c9d5a971086c564b711ff0c883ed87af6f295500e555. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:43:29Z), 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/JPSR09003720.
      date published: 2026-07-19T22:43:29Z
    audio: 祝いしぐれ
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 71.945
      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: 0.42
      additional property: Energy
        type: PropertyValue
        value: 0.37
      additional property: Speechiness
        type: PropertyValue
        value: 0.033
      additional property: Acousticness
        type: PropertyValue
        value: 0.89
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.336
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.405
      additional property: Loudness (dB)
        type: PropertyValue
        value: -9.691
      additional property: Key Name
        type: PropertyValue
        value: D
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: ふたりづれ
  type: MusicAlbum
  date published: 1993-05-21
album: 追分酒場
  type: MusicAlbum
  date published: 1994-05-21
album: 夫婦草
  type: MusicAlbum
  date published: 1995-10-21
album: 夢追いぐらし
  type: MusicAlbum
  date published: 1997-07-21
album: 人生ふたり旅
  type: MusicAlbum
  date published: 1998-07-18
album: 花街一代
  type: MusicAlbum
  date published: 1999-08-21