宿題集中力
type: MusicGroup
popularity: 4
followers: 24
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x3c8f79a1e4625890d246e302ec95f7b86e8c504bf2e366fae7ecebd3730f69d7
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954667
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954667
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b19b656c-f463-4cc7-822d-2b083aabb557.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b19b656c-f463-4cc7-822d-2b083aabb557.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/b19b656c-f463-4cc7-822d-2b083aabb557
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T07:29:20Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x3c8f79a1e4625890d246e302ec95f7b86e8c504bf2e366fae7ecebd3730f69d7","name":"宿題集中力","registered_at":"2026-06-20T12:28:37Z","symbol":"NIM1613509","token_address":"0xc0a4e3ae3e70b7dfe31058889d255a6c91760b4f","type":"artist","uuid":"b19b656c-f463-4cc7-822d-2b083aabb557"}
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 0x3c8f79a1e4625890d246e302ec95f7b86e8c504bf2e366fae7ecebd3730f69d7. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b19b656c-f463-4cc7-822d-2b083aabb557.json and https://artists.proofprofile.net/proofs/artist/b19b656c-f463-4cc7-822d-2b083aabb557.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T07:29:20Z
  text: {"copyright_id":"0x3c8f79a1e4625890d246e302ec95f7b86e8c504bf2e366fae7ecebd3730f69d7","name":"宿題集中力","registered_at":"2026-06-20T12:28:37Z","symbol":"NIM1613509","token_address":"0xc0a4e3ae3e70b7dfe31058889d255a6c91760b4f","type":"artist","uuid":"b19b656c-f463-4cc7-822d-2b083aabb557"}
album: 夏休みの宿題集中音楽: 水の音で涼しさ感じる勉強集中ＢＧＭ
  type: MusicAlbum
  date published: 2020-07-13
album: 勉強用雨の音: 長時間集中雨の音, マスキング自然音, アンビエント勉強ＢＧＭ
  type: MusicAlbum
  date published: 2021-02-09
  track: 雨音ＢＧＭ
    type: MusicRecording
    duration: PT4M14S
    duration ms: 254996
    explicit: false
    by artist: 宿題集中力
    in album: 勉強用雨の音: 長時間集中雨の音, マスキング自然音, アンビエント勉強ＢＧＭ
      type: MusicAlbum
      date published: 2021-02-09
    isrc code: ITO102054620
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-03T06:27:45+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xb1d8666c681f8d5c3d96f50cc4b042a7c48bd3a50765355a3e3d0716b2cbc919
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956500
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956500
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITO102054620
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-03T13:55:21Z
    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 0xb1d8666c681f8d5c3d96f50cc4b042a7c48bd3a50765355a3e3d0716b2cbc919. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/ITO102054620.
      date published: 2026-07-03T13:55:21Z
    audio: 雨音ＢＧＭ
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 179.31
      additional property: Musical Key
        type: PropertyValue
        value: 1
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.078
      additional property: Energy
        type: PropertyValue
        value: 0.111
      additional property: Speechiness
        type: PropertyValue
        value: 0.046
      additional property: Acousticness
        type: PropertyValue
        value: 0.633
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.911
      additional property: Liveness
        type: PropertyValue
        value: 0.127
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.036
      additional property: Loudness (dB)
        type: PropertyValue
        value: -28.631
      additional property: Key Name
        type: PropertyValue
        value: C#
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: 春の勉強ＢＧＭ: 仕事や勉強がはかどる絶対集中自然音
  type: MusicAlbum
  date published: 2021-04-20
album: 勉強用波の音: 脳を活発にする自然音, 冷感効果で集中する勉強BGM
  type: MusicAlbum
  date published: 2022-07-08