うつけ坂49
type: MusicGroup
popularity: 2
followers: 684
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xf8129b24a753182f6151da1bd1c7be17ddf93f215853c4e6168cf05cb90fff60
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954717
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954717
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/f55f1ad4-d41a-44ad-95da-ecdd78097cd9.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/f55f1ad4-d41a-44ad-95da-ecdd78097cd9.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/f55f1ad4-d41a-44ad-95da-ecdd78097cd9
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T15:47:51Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xf8129b24a753182f6151da1bd1c7be17ddf93f215853c4e6168cf05cb90fff60","name":"うつけ坂49","registered_at":"2026-06-21T15:03:55Z","symbol":"NIM1954023","token_address":"0x4cf0ced3574659722f0248d779db8abfce13b40c","type":"artist","uuid":"f55f1ad4-d41a-44ad-95da-ecdd78097cd9"}
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 0xf8129b24a753182f6151da1bd1c7be17ddf93f215853c4e6168cf05cb90fff60. Chain 2 (Bitcoin): anchored in block 954717 (2026-06-21T15:47:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f55f1ad4-d41a-44ad-95da-ecdd78097cd9.json and https://artists.proofprofile.net/proofs/artist/f55f1ad4-d41a-44ad-95da-ecdd78097cd9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T15:47:51Z
  text: {"copyright_id":"0xf8129b24a753182f6151da1bd1c7be17ddf93f215853c4e6168cf05cb90fff60","name":"うつけ坂49","registered_at":"2026-06-21T15:03:55Z","symbol":"NIM1954023","token_address":"0x4cf0ced3574659722f0248d779db8abfce13b40c","type":"artist","uuid":"f55f1ad4-d41a-44ad-95da-ecdd78097cd9"}
album: 黒い小姓
  type: MusicAlbum
  date published: 2020-08-02
  track: 黒い小姓
    type: MusicRecording
    duration: PT2M43S
    duration ms: 163346
    explicit: false
    by artist: うつけ坂49
    in album: 黒い小姓
      type: MusicAlbum
      date published: 2020-08-02
    isrc code: JPKI02014069
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-20T06:46:29+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x9139f78f324c354cdbd04066fd3ae267a875d4aca748007f1aaa60d0c50ee38d
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958842
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958842
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPKI02014069
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-20T09:48:18Z
    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 0x9139f78f324c354cdbd04066fd3ae267a875d4aca748007f1aaa60d0c50ee38d. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:48:18Z), 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/JPKI02014069.
      date published: 2026-07-20T09:48:18Z
    audio: 黒い小姓
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 127.945
      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: 0.582
      additional property: Energy
        type: PropertyValue
        value: 0.895
      additional property: Speechiness
        type: PropertyValue
        value: 0.047
      additional property: Acousticness
        type: PropertyValue
        value: 0
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.307
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.789
      additional property: Loudness (dB)
        type: PropertyValue
        value: -4.161
      additional property: Key Name
        type: PropertyValue
        value: D
      additional property: Mode Name
        type: PropertyValue
        value: Major