The Kasukabe Municipal Toyoharu Junior High School
type: MusicGroup
genre: choral
popularity: 2
followers: 2
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additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
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additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/ee32fdc8-4380-43fc-940e-2227d5c7433b.ots
additional property: OTSRecordURL
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  value: https://artists.proofprofile.net/proofs/artist/ee32fdc8-4380-43fc-940e-2227d5c7433b.json
additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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additional property: OTSCanonicalRecord
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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
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea808a870d080f5325d29db2032f1500a38581bacd73c0f4e6477f7b6e46c9ea. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ee32fdc8-4380-43fc-940e-2227d5c7433b.json and https://artists.proofprofile.net/proofs/artist/ee32fdc8-4380-43fc-940e-2227d5c7433b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T13:42:37Z
  text: {"copyright_id":"0xea808a870d080f5325d29db2032f1500a38581bacd73c0f4e6477f7b6e46c9ea","name":"The Kasukabe Municipal Toyoharu Junior High School","registered_at":"2026-06-21T12:05:02Z","symbol":"NIM1917834","token_address":"0xd79a6853dcefcd411eb34d3cb38ff89f84e0989b","type":"artist","uuid":"ee32fdc8-4380-43fc-940e-2227d5c7433b"}
track: The May 9th
  type: MusicRecording
  duration: PT4M26S
  duration ms: 266000
  explicit: false
  by artist: The Kasukabe Municipal Toyoharu Junior High School
  in album: Emotional Voice! Chorus Harmony of the Youth Listen with Your Heart Graduation Songs Best
    type: MusicAlbum
    date published: 2016-12-14
  isrc code: JPR291600625
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    value: https://blockstream.info/api/block-height/956304
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPR291600625
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-02T03:55:08Z
  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 0xfb382aae0043db7adcf0df0dd14f09ef40623d8029659e61c6b1fe586b4ba214. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPR291600625.
    date published: 2026-07-02T03:55:08Z
  audio: The May 9th
    type: AudioObject
    additional property: Tempo (BPM)
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    additional property: Mode (Major/Minor)
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      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 5
    additional property: Danceability
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    additional property: Energy
      type: PropertyValue
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    additional property: Speechiness
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    additional property: Acousticness
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    additional property: Instrumentalness
      type: PropertyValue
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    additional property: Liveness
      type: PropertyValue
      value: 0.134
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.111
    additional property: Loudness (dB)
      type: PropertyValue
      value: -24.756
    additional property: Key Name
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      value: E
    additional property: Mode Name
      type: PropertyValue
      value: Major