courtesea
type: MusicGroup
genre: shibuya-kei
popularity: 4
followers: 595
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x34240763fc16da3face77b79f59d58d8da1927bb6004aa7680fab9ed63dc9970
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954580
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954580
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b6e8c27c-9592-436b-9767-d1c78bc52cdc.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b6e8c27c-9592-436b-9767-d1c78bc52cdc.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/b6e8c27c-9592-436b-9767-d1c78bc52cdc
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T17:48:00Z
additional property: OTSCanonicalRecord
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 0x34240763fc16da3face77b79f59d58d8da1927bb6004aa7680fab9ed63dc9970. Chain 2 (Bitcoin): anchored in block 954580 (2026-06-20T17:48:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b6e8c27c-9592-436b-9767-d1c78bc52cdc.json and https://artists.proofprofile.net/proofs/artist/b6e8c27c-9592-436b-9767-d1c78bc52cdc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T17:48:00Z
album: Sea Of Wonder
  type: MusicAlbum
  date published: 2022-08-23
album: Sea Of Wonder
  type: MusicAlbum
  date published: 2022-08-23
album: Me, a sunny sky, dreamy colors.
  type: MusicAlbum
  date published: 2022-11-02
album: わたし、晴れ空、夢色。
  type: MusicAlbum
  date published: 2022-11-02
album: Me, a sunny sky, dreamy colors.
  type: MusicAlbum
  date published: 2022-11-02
album: わたし、晴れ空、夢色。
  type: MusicAlbum
  date published: 2022-11-02
album: ファイソン！
  type: MusicAlbum
  date published: 2023-05-02
album: ココロノトビラ
  type: MusicAlbum
  date published: 2023-07-25
album: Kokorono Tobira
  type: MusicAlbum
  date published: 2023-07-25
album: 17
  type: MusicAlbum
  date published: 2023-09-27
album: 17
  type: MusicAlbum
  date published: 2023-09-27
album: 193
  type: MusicAlbum
  date published: 2023-12-06
album: イッキュウサン
  type: MusicAlbum
  date published: 2023-12-06
album: 恋始まりのダイアリー
  type: MusicAlbum
  date published: 2024-04-17
album: Fall in Love diary
  type: MusicAlbum
  date published: 2024-04-17
album: Fight Song!
  type: MusicAlbum
  date published: 2024-05-02
album: ファイソン！
  type: MusicAlbum
  date published: 2024-05-02
album: Sea Of Blue
  type: MusicAlbum
  date published: 2024-08-27
album: Sea Of Blue
  type: MusicAlbum
  date published: 2024-08-27
album: 青春☆地団駄団
  type: MusicAlbum
  date published: 2025-03-31
album: Seishun Jidanda Dan
  type: MusicAlbum
  date published: 2025-03-31
album: Let’s do it!
  type: MusicAlbum
  date published: 2025-04-30
album: Let’s do it!
  type: MusicAlbum
  date published: 2025-04-30
album: Umbrella Story
  type: MusicAlbum
  date published: 2025-07-02
  track: Umbrella Story
    type: MusicRecording
    duration: PT4M24S
    duration ms: 264375
    explicit: false
    by artist: courtesea
    in album: Umbrella Story
      type: MusicAlbum
      date published: 2025-07-02
    genre: shibuya-kei
    isrc code: JP92E2500945
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-19T14:41:22+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xfc613020f07928956073b8106147c63b7aac6c1e66ed25e5e33c24035a78885c
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958746
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958746
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JP92E2500945
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-19T17:44:22Z
    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 0xfc613020f07928956073b8106147c63b7aac6c1e66ed25e5e33c24035a78885c. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:44:22Z), 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/JP92E2500945.
      date published: 2026-07-19T17:44:22Z
    audio: Umbrella Story
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 127.97
      additional property: Musical Key
        type: PropertyValue
        value: 11
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.625
      additional property: Energy
        type: PropertyValue
        value: 0.956
      additional property: Speechiness
        type: PropertyValue
        value: 0.043
      additional property: Acousticness
        type: PropertyValue
        value: 0.007
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.001
      additional property: Liveness
        type: PropertyValue
        value: 0.321
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.789
      additional property: Loudness (dB)
        type: PropertyValue
        value: -3.73
      additional property: Key Name
        type: PropertyValue
        value: B
      additional property: Mode Name
        type: PropertyValue
        value: Minor
album: Umbrella Story
  type: MusicAlbum
  date published: 2025-07-02
album: なつのSay！～そうだ！ライブに行こう！～
  type: MusicAlbum
  date published: 2025-09-08
album: Say of SUMMER！〜OH！I will go to concert！〜

Say of SUMMER！〜OH！I will go to concert！〜
type: MusicAlbum
date published: 2025-09-08