Ito Yumiko
type: MusicGroup
popularity: 9
followers: 13
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x915cd5aaf52d5cfaef255956e8d9a3acce2514001737e51e1616722b7b095485
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954784
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954784
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/f2c78410-529d-4657-95b5-e61428ba250a.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/f2c78410-529d-4657-95b5-e61428ba250a.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/f2c78410-529d-4657-95b5-e61428ba250a
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-22T02:53:59Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x915cd5aaf52d5cfaef255956e8d9a3acce2514001737e51e1616722b7b095485","name":"Ito Yumiko","registered_at":"2026-06-21T13:45:28Z","symbol":"NIM1938600","token_address":"0x20f981d41eebd1402d1a9689a6ebdc06fde22b94","type":"artist","uuid":"f2c78410-529d-4657-95b5-e61428ba250a"}
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 0x915cd5aaf52d5cfaef255956e8d9a3acce2514001737e51e1616722b7b095485. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f2c78410-529d-4657-95b5-e61428ba250a.json and https://artists.proofprofile.net/proofs/artist/f2c78410-529d-4657-95b5-e61428ba250a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-22T02:53:59Z
  text: {"copyright_id":"0x915cd5aaf52d5cfaef255956e8d9a3acce2514001737e51e1616722b7b095485","name":"Ito Yumiko","registered_at":"2026-06-21T13:45:28Z","symbol":"NIM1938600","token_address":"0x20f981d41eebd1402d1a9689a6ebdc06fde22b94","type":"artist","uuid":"f2c78410-529d-4657-95b5-e61428ba250a"}
album: Wind Scene (From "Chrono Trigger") - piano version
  type: MusicAlbum
  date published: 2024-11-01
album: Fallen Down (From "Undertale") - piano version
  type: MusicAlbum
  date published: 2024-11-22
  track: Fallen Down (From "Undertale") - piano version
    type: MusicRecording
    duration: PT3M36S
    duration ms: 216000
    explicit: false
    by artist: Ito Yumiko
    in album: Fallen Down (From "Undertale") - piano version
      type: MusicAlbum
      date published: 2024-11-22
    isrc code: SE6YL2401753
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-03T15:34:56+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x7c552eb91728f6b5aa9853aa85072be867c6b60e94b499fd2305a072158a5238
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956551
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956551
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE6YL2401753
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-03T21:18:05Z
    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 0x7c552eb91728f6b5aa9853aa85072be867c6b60e94b499fd2305a072158a5238. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/SE6YL2401753.
      date published: 2026-07-03T21:18:05Z
    audio: Fallen Down (From "Undertale") - piano version
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 159.036
      additional property: Musical Key
        type: PropertyValue
        value: 4
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 3
      additional property: Danceability
        type: PropertyValue
        value: 0.501
      additional property: Energy
        type: PropertyValue
        value: 0.065
      additional property: Speechiness
        type: PropertyValue
        value: 0.077
      additional property: Acousticness
        type: PropertyValue
        value: 0.995
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.858
      additional property: Liveness
        type: PropertyValue
        value: 0.13
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.406
      additional property: Loudness (dB)
        type: PropertyValue
        value: -25.234
      additional property: Key Name
        type: PropertyValue
        value: E
      additional property: Mode Name
        type: PropertyValue
        value: Major