Yutaka Sadoyama
type: MusicGroup
genre: kayokyoku
popularity: 5
followers: 360
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xc50e393ed00fcd7a0777a7cf20db75e83ed17fdd76bf5fe41fd5f604dc5d10f3
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954549
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954549
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/aa8568d9-16c3-4398-99ed-c5be3ef26402.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/aa8568d9-16c3-4398-99ed-c5be3ef26402.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/aa8568d9-16c3-4398-99ed-c5be3ef26402
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T10:56:20Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xc50e393ed00fcd7a0777a7cf20db75e83ed17fdd76bf5fe41fd5f604dc5d10f3","name":"Yutaka Sadoyama","registered_at":"2026-06-20T09:22:34Z","symbol":"NIM1578636","token_address":"0xec8a40e1843429bb34594af241b33083f1d58fb6","type":"artist","uuid":"aa8568d9-16c3-4398-99ed-c5be3ef26402"}
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 0xc50e393ed00fcd7a0777a7cf20db75e83ed17fdd76bf5fe41fd5f604dc5d10f3. Chain 2 (Bitcoin): anchored in block 954549 (2026-06-20T10:56:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aa8568d9-16c3-4398-99ed-c5be3ef26402.json and https://artists.proofprofile.net/proofs/artist/aa8568d9-16c3-4398-99ed-c5be3ef26402.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T10:56:20Z
  text: {"copyright_id":"0xc50e393ed00fcd7a0777a7cf20db75e83ed17fdd76bf5fe41fd5f604dc5d10f3","name":"Yutaka Sadoyama","registered_at":"2026-06-20T09:22:34Z","symbol":"NIM1578636","token_address":"0xec8a40e1843429bb34594af241b33083f1d58fb6","type":"artist","uuid":"aa8568d9-16c3-4398-99ed-c5be3ef26402"}
album: 世間知らずの佐渡山豊
  type: MusicAlbum
  date published: 1973
album: Sekenshirazuno Sadoyama Yutaka
  type: MusicAlbum
  date published: 1973-05-25
album: 世間知らずの佐渡山豊
  type: MusicAlbum
  date published: 1973-05-25
  track: 新沖縄音頭
    type: MusicRecording
    duration: PT2M17S
    duration ms: 137400
    explicit: false
    by artist: Yutaka Sadoyama
    in album: 世間知らずの佐渡山豊
      type: MusicAlbum
      date published: 1973-05-25
    genre: kayokyoku
    isrc code: JPVP00607909
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-12T23:56:23+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x1d897ca8b0fba9b6fb9053a3c4affcaf941c721b05506c54d9c31adeeec7a0aa
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 957776
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/957776
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPVP00607909
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-13T00:05:10Z
    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 0x1d897ca8b0fba9b6fb9053a3c4affcaf941c721b05506c54d9c31adeeec7a0aa. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/JPVP00607909.
      date published: 2026-07-13T00:05:10Z
    audio: 新沖縄音頭
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 67.496
      additional property: Musical Key
        type: PropertyValue
        value: 4
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.523
      additional property: Energy
        type: PropertyValue
        value: 0.722
      additional property: Speechiness
        type: PropertyValue
        value: 0.183
      additional property: Acousticness
        type: PropertyValue
        value: 0.743
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.025
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.745
      additional property: Loudness (dB)
        type: PropertyValue
        value: -5.348
      additional property: Key Name
        type: PropertyValue
        value: E
      additional property: Mode Name
        type: PropertyValue
        value: Major