Mayumi Kato
type: MusicGroup
popularity: 5
followers: 306
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x339f70f8569269be44193e0a3827bc80a1a1591256b17738a094cc0d3477b800
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/e400f204-97eb-44a9-b21a-326103d37ff8.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/e400f204-97eb-44a9-b21a-326103d37ff8.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/e400f204-97eb-44a9-b21a-326103d37ff8
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-22T02:53:59Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x339f70f8569269be44193e0a3827bc80a1a1591256b17738a094cc0d3477b800","name":"Mayumi Kato","registered_at":"2026-06-21T07:43:21Z","symbol":"NIM1866146","token_address":"0xb8298e0a6cb5f3b61cd2fa452f65cd9a521508b8","type":"artist","uuid":"e400f204-97eb-44a9-b21a-326103d37ff8"}
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 0x339f70f8569269be44193e0a3827bc80a1a1591256b17738a094cc0d3477b800. 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/e400f204-97eb-44a9-b21a-326103d37ff8.json and https://artists.proofprofile.net/proofs/artist/e400f204-97eb-44a9-b21a-326103d37ff8.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
  date published: 2026-06-22T02:53:59Z
  text: {"copyright_id":"0x339f70f8569269be44193e0a3827bc80a1a1591256b17738a094cc0d3477b800","name":"Mayumi Kato","registered_at":"2026-06-21T07:43:21Z","symbol":"NIM1866146","token_address":"0xb8298e0a6cb5f3b61cd2fa452f65cd9a521508b8","type":"artist","uuid":"e400f204-97eb-44a9-b21a-326103d37ff8"}
album: Mayumi Kato Piano Works, Volume 2
  type: MusicAlbum
  date published: 2016-06-11
album: Mayumi Kato Piano Works, Volume 1
  type: MusicAlbum
  date published: 2016-06-11
album: The Bamboo Princess
  type: MusicAlbum
  date published: 2017-12-01
album: Mayumi Kato Piano Works, Volume 3
  type: MusicAlbum
  date published: 2017-12-08
album: Secret Garden (Mayumi Kato Piano Works, Volume 4)
  type: MusicAlbum
  date published: 2024-01-25
  track: Silent
    type: MusicRecording
    duration: PT3M16S
    duration ms: 196688
    explicit: false
    by artist: Mayumi Kato
    in album: Secret Garden (Mayumi Kato Piano Works, Volume 4)
      type: MusicAlbum
      date published: 2024-01-25
    isrc code: QZFYY2428584
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-05T12:43:52+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xf57aaa870136a87d9c657c2d061f48881a7f3442181649e75ec48ab1be2cf91d
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956822
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956822
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFYY2428584
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-05T18:48:28Z
    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 0xf57aaa870136a87d9c657c2d061f48881a7f3442181649e75ec48ab1be2cf91d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFYY2428584 — a six-check JSON result.
      date published: 2026-07-05T18:48:28Z
    audio: Silent
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 108.363
      additional property: Musical Key
        type: PropertyValue
        value: 0
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.508
      additional property: Energy
        type: PropertyValue
        value: 0.006
      additional property: Speechiness
        type: PropertyValue
        value: 0.066
      additional property: Acousticness
        type: PropertyValue
        value: 0.995
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.883
      additional property: Liveness
        type: PropertyValue
        value: 0.094
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.398
      additional property: Loudness (dB)
        type: PropertyValue
        value: -27.173
      additional property: Key Name
        type: PropertyValue
        value: C
      additional property: Mode Name
        type: PropertyValue
        value: Minor