向田民子
type: MusicGroup
genre: shibuya-kei
popularity: 11
followers: 454
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x01452ef1e97a3259dd13561fba47edb34c791319e9ad9fa8af727c4a9498fa27
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953807
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953807
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/ef8d859b-47c4-4c29-a48f-f2434fc77f55.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/ef8d859b-47c4-4c29-a48f-f2434fc77f55.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/ef8d859b-47c4-4c29-a48f-f2434fc77f55
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-15T16:39:18Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x01452ef1e97a3259dd13561fba47edb34c791319e9ad9fa8af727c4a9498fa27","name":"向田民子","registered_at":"2026-06-15T05:41:04Z","symbol":"NIM0699442","token_address":"0x2b9962474802bc377b707734310742d617b9e956","type":"artist","uuid":"ef8d859b-47c4-4c29-a48f-f2434fc77f55"}
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 0x01452ef1e97a3259dd13561fba47edb34c791319e9ad9fa8af727c4a9498fa27. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ef8d859b-47c4-4c29-a48f-f2434fc77f55.json and https://artists.proofprofile.net/proofs/artist/ef8d859b-47c4-4c29-a48f-f2434fc77f55.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-15T16:39:18Z
  text: {"copyright_id":"0x01452ef1e97a3259dd13561fba47edb34c791319e9ad9fa8af727c4a9498fa27","name":"向田民子","registered_at":"2026-06-15T05:41:04Z","symbol":"NIM0699442","token_address":"0x2b9962474802bc377b707734310742d617b9e956","type":"artist","uuid":"ef8d859b-47c4-4c29-a48f-f2434fc77f55"}
album: 花束の中に
  type: MusicAlbum
  date published: 2024-11-13
  track: 花束の中に
    type: MusicRecording
    duration: PT2M50S
    duration ms: 170075
    explicit: false
    by artist: 向田民子
    in album: 花束の中に
      type: MusicAlbum
      date published: 2024-11-13
    genre: shibuya-kei
    isrc code: JP92N2450256
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-17T13:37:06+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x63e030f5621418a6738ea25d51ae7fced6e42505d6c23125c68ffe0ac8708f08
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958428
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958428
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JP92N2450256
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-17T15:15:14Z
    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 0x63e030f5621418a6738ea25d51ae7fced6e42505d6c23125c68ffe0ac8708f08. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/JP92N2450256.
      date published: 2026-07-17T15:15:14Z
    audio: 花束の中に
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 132.972
      additional property: Musical Key
        type: PropertyValue
        value: 5
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.637
      additional property: Energy
        type: PropertyValue
        value: 0.917
      additional property: Speechiness
        type: PropertyValue
        value: 0.035
      additional property: Acousticness
        type: PropertyValue
        value: 0.113
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.011
      additional property: Liveness
        type: PropertyValue
        value: 0.212
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.93
      additional property: Loudness (dB)
        type: PropertyValue
        value: -6.306
      additional property: Key Name
        type: PropertyValue
        value: F
      additional property: Mode Name
        type: PropertyValue
        value: Minor
album: ステイ・イン・トゥナイト
  type: MusicAlbum
  date published: 2025-03-19
album: TOKYO
  type: MusicAlbum
  date published: 2025-10-01