Nobuko Matsumiya
type: MusicGroup
genre: japanese classical
genre: traditional music
popularity: 6
followers: 352
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x90f7244d8d6c971acf07d1a3de0bba1f356076660fdc04d8137aee52497278ed
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954035
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954035
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/3c59f379-dc06-475d-bcd7-b0511a9fcec6.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/3c59f379-dc06-475d-bcd7-b0511a9fcec6.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/3c59f379-dc06-475d-bcd7-b0511a9fcec6
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T02:39:28Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x90f7244d8d6c971acf07d1a3de0bba1f356076660fdc04d8137aee52497278ed","name":"Nobuko Matsumiya","registered_at":"2026-06-16T10:38:10Z","symbol":"NIM1025758","token_address":"0xc48a8e5d4d249282e429edfa15eedae2b08a8405","type":"artist","uuid":"3c59f379-dc06-475d-bcd7-b0511a9fcec6"}
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 0x90f7244d8d6c971acf07d1a3de0bba1f356076660fdc04d8137aee52497278ed. 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/3c59f379-dc06-475d-bcd7-b0511a9fcec6.json and https://artists.proofprofile.net/proofs/artist/3c59f379-dc06-475d-bcd7-b0511a9fcec6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
  text: {"copyright_id":"0x90f7244d8d6c971acf07d1a3de0bba1f356076660fdc04d8137aee52497278ed","name":"Nobuko Matsumiya","registered_at":"2026-06-16T10:38:10Z","symbol":"NIM1025758","token_address":"0xc48a8e5d4d249282e429edfa15eedae2b08a8405","type":"artist","uuid":"3c59f379-dc06-475d-bcd7-b0511a9fcec6"}
album: Traditional Music from Japan
  type: MusicAlbum
  date published: 2000
  track: Sakura
    type: MusicRecording
    duration: PT5M27S
    duration ms: 327480
    explicit: false
    by artist: Nobuko Matsumiya
    in album: Traditional Music from Japan
      type: MusicAlbum
      date published: 2000
    genre: japanese classical
    genre: traditional music
    isrc code: LUP501300220
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-03T03:48:22+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x61d774172d25d0892fbd24954998a40b12403e30db372fe728db77564a5c93b3
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956476
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956476
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/LUP501300220
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-03T09:04:44Z
    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 0x61d774172d25d0892fbd24954998a40b12403e30db372fe728db77564a5c93b3. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/LUP501300220.
      date published: 2026-07-03T09:04:44Z
    audio: Sakura
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 104.636
      additional property: Musical Key
        type: PropertyValue
        value: 7
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.458
      additional property: Energy
        type: PropertyValue
        value: 0.177
      additional property: Speechiness
        type: PropertyValue
        value: 0.044
      additional property: Acousticness
        type: PropertyValue
        value: 0.99
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.769
      additional property: Liveness
        type: PropertyValue
        value: 0.343
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.463
      additional property: Loudness (dB)
        type: PropertyValue
        value: -14.445
      additional property: Key Name
        type: PropertyValue
        value: G
      additional property: Mode Name
        type: PropertyValue
        value: Minor