自然音 友音堂
type: MusicGroup
popularity: 4
followers: 21
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x19b7f0ff6a0e8d3ae56a22d7da5100bc376aa40062e7f6df48b05b69330790b0
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954346
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954346
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/98afe6f2-9cee-4098-88d6-42632d95418f.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/98afe6f2-9cee-4098-88d6-42632d95418f.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/98afe6f2-9cee-4098-88d6-42632d95418f
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-19T03:51:26Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x19b7f0ff6a0e8d3ae56a22d7da5100bc376aa40062e7f6df48b05b69330790b0","name":"自然音 友音堂","registered_at":"2026-06-17T18:57:50Z","symbol":"NIM1488441","token_address":"0x9b1fb27d5a7f35988859b8a35ba8807d17c2421c","type":"artist","uuid":"98afe6f2-9cee-4098-88d6-42632d95418f"}
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 0x19b7f0ff6a0e8d3ae56a22d7da5100bc376aa40062e7f6df48b05b69330790b0. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/98afe6f2-9cee-4098-88d6-42632d95418f.json and https://artists.proofprofile.net/proofs/artist/98afe6f2-9cee-4098-88d6-42632d95418f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-19T03:51:26Z
  text: {"copyright_id":"0x19b7f0ff6a0e8d3ae56a22d7da5100bc376aa40062e7f6df48b05b69330790b0","name":"自然音 友音堂","registered_at":"2026-06-17T18:57:50Z","symbol":"NIM1488441","token_address":"0x9b1fb27d5a7f35988859b8a35ba8807d17c2421c","type":"artist","uuid":"98afe6f2-9cee-4098-88d6-42632d95418f"}
album: 自然音 勉強 集中できる音 (作業用BGM 焚き火の音)
  type: MusicAlbum
  date published: 2023-05-30
album: フクロウの鳴き声 森の音で眠る 究極のリラックスbgm (ふくろうの鳴き声)
  type: MusicAlbum
  date published: 2023-05-31
  track: 川の音 睡眠用
    type: MusicRecording
    duration: PT4M58S
    duration ms: 298965
    explicit: false
    by artist: 自然音 友音堂
    in album: フクロウの鳴き声 森の音で眠る 究極のリラックスbgm (ふくろうの鳴き声)
      type: MusicAlbum
      date published: 2023-05-31
    isrc code: JPW462326875
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-18T23:03:03+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xae1db96c945507141c3940ee02f9a7f65de45d7c2869d772adffb0661d5cc332
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958627
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958627
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPW462326875
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-18T23:33:54Z
    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 0xae1db96c945507141c3940ee02f9a7f65de45d7c2869d772adffb0661d5cc332. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/JPW462326875.
      date published: 2026-07-18T23:33:54Z
    audio: 川の音 睡眠用
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 135.971
      additional property: Musical Key
        type: PropertyValue
        value: 10
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 1
      additional property: Danceability
        type: PropertyValue
        value: 0.294
      additional property: Energy
        type: PropertyValue
        value: 0.784
      additional property: Speechiness
        type: PropertyValue
        value: 0.077
      additional property: Acousticness
        type: PropertyValue
        value: 0.785
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.749
      additional property: Liveness
        type: PropertyValue
        value: 0.878
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.022
      additional property: Loudness (dB)
        type: PropertyValue
        value: -35.28
      additional property: Key Name
        type: PropertyValue
        value: Bb
      additional property: Mode Name
        type: PropertyValue
        value: Minor