オオタ ユカ
type: MusicGroup
popularity: 10
followers: 338
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x4f48ade416c2817d8b89d67adf93e13d98ff071e0992e8ad7a1b53d178fcd54a
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954693
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954693
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/e43fd0bb-d9e8-48f7-a39f-1e3d5fe21429.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/e43fd0bb-d9e8-48f7-a39f-1e3d5fe21429.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/e43fd0bb-d9e8-48f7-a39f-1e3d5fe21429
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T11:50:32Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x4f48ade416c2817d8b89d67adf93e13d98ff071e0992e8ad7a1b53d178fcd54a","name":"オオタ ユカ","registered_at":"2026-06-21T07:48:23Z","symbol":"NIM1866653","token_address":"0x43f1f847456bf729e8176d22a1b05f47d7556fa2","type":"artist","uuid":"e43fd0bb-d9e8-48f7-a39f-1e3d5fe21429"}
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 0x4f48ade416c2817d8b89d67adf93e13d98ff071e0992e8ad7a1b53d178fcd54a. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e43fd0bb-d9e8-48f7-a39f-1e3d5fe21429.json and https://artists.proofprofile.net/proofs/artist/e43fd0bb-d9e8-48f7-a39f-1e3d5fe21429.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T11:50:32Z
  text: {"copyright_id":"0x4f48ade416c2817d8b89d67adf93e13d98ff071e0992e8ad7a1b53d178fcd54a","name":"オオタ ユカ","registered_at":"2026-06-21T07:48:23Z","symbol":"NIM1866653","token_address":"0x43f1f847456bf729e8176d22a1b05f47d7556fa2","type":"artist","uuid":"e43fd0bb-d9e8-48f7-a39f-1e3d5fe21429"}
album: ULTRA PRIDE
  type: MusicAlbum
  date published: 2024-02-07
  track: Be myself
    type: MusicRecording
    duration: PT4M3S
    duration ms: 243000
    explicit: false
    by artist: オオタ ユカ
    in album: ULTRA PRIDE
      type: MusicAlbum
      date published: 2024-02-07
    isrc code: JPQ692300104
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-17T16:19:04+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xf2bb799e5501484f641be04768360ea8bb853e6eab9c2718b02a2e99bafbb5ad
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958436
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958436
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPQ692300104
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-17T16:42:22Z
    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 0xf2bb799e5501484f641be04768360ea8bb853e6eab9c2718b02a2e99bafbb5ad. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/JPQ692300104.
      date published: 2026-07-17T16:42:22Z
    audio: Be myself
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 192.058
      additional property: Musical Key
        type: PropertyValue
        value: 6
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.292
      additional property: Energy
        type: PropertyValue
        value: 0.985
      additional property: Speechiness
        type: PropertyValue
        value: 0.156
      additional property: Acousticness
        type: PropertyValue
        value: 0.001
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.383
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.241
      additional property: Loudness (dB)
        type: PropertyValue
        value: -2.009
      additional property: Key Name
        type: PropertyValue
        value: F#
      additional property: Mode Name
        type: PropertyValue
        value: Major