今田学
type: MusicGroup
genre: aor
genre: city pop
popularity: 3
followers: 146
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x75c6c718e5c657b24f2992b4373e0f5fab73438c4e7e7e26a7ec51f8213d327b
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954346
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954346
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/93d18461-b0da-4302-a976-88f1d86bcc1d.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/93d18461-b0da-4302-a976-88f1d86bcc1d.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/93d18461-b0da-4302-a976-88f1d86bcc1d
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-19T03:51:26Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x75c6c718e5c657b24f2992b4373e0f5fab73438c4e7e7e26a7ec51f8213d327b","name":"今田学","registered_at":"2026-06-17T17:15:06Z","symbol":"NIM1463919","token_address":"0x48740f536f08d20e1b3d62e9e632d839db3a2c96","type":"artist","uuid":"93d18461-b0da-4302-a976-88f1d86bcc1d"}
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 0x75c6c718e5c657b24f2992b4373e0f5fab73438c4e7e7e26a7ec51f8213d327b. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/93d18461-b0da-4302-a976-88f1d86bcc1d.json and https://artists.proofprofile.net/proofs/artist/93d18461-b0da-4302-a976-88f1d86bcc1d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-19T03:51:26Z
  text: {"copyright_id":"0x75c6c718e5c657b24f2992b4373e0f5fab73438c4e7e7e26a7ec51f8213d327b","name":"今田学","registered_at":"2026-06-17T17:15:06Z","symbol":"NIM1463919","token_address":"0x48740f536f08d20e1b3d62e9e632d839db3a2c96","type":"artist","uuid":"93d18461-b0da-4302-a976-88f1d86bcc1d"}
album: a day in my life
  type: MusicAlbum
  date published: 2022-11-23
  track: 来月
    type: MusicRecording
    duration: PT4M41S
    duration ms: 281428
    explicit: false
    by artist: 今田学
    in album: a day in my life
      type: MusicAlbum
      date published: 2022-11-23
    genre: aor
    genre: city pop
    isrc code: TCJPT2267008
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-05T02:26:49+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xd515019789a51c1b5adee679735a5f4c19b0d903426670abd398a9242a4dfda4
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956772
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956772
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPT2267008
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-05T10:01:46Z
    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 0xd515019789a51c1b5adee679735a5f4c19b0d903426670abd398a9242a4dfda4. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCJPT2267008.
      date published: 2026-07-05T10:01:46Z
    audio: 来月
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 83.948
      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: 0.599
      additional property: Energy
        type: PropertyValue
        value: 0.596
      additional property: Speechiness
        type: PropertyValue
        value: 0.031
      additional property: Acousticness
        type: PropertyValue
        value: 0.304
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.139
      additional property: Liveness
        type: PropertyValue
        value: 0.178
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.578
      additional property: Loudness (dB)
        type: PropertyValue
        value: -6.669
      additional property: Key Name
        type: PropertyValue
        value: F#
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: just in time (feat. 藤原洋輔)
  type: MusicAlbum
  date published: 2024-09-25
album: 新しいうた (feat. 山本ひかり)
  type: MusicAlbum
  date published: 2024-10-30