W.sayaka
type: MusicGroup
popularity: 8
followers: 371
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x359ae6e0c25c57a78a3413063808136577d6910e52c3d1d1f6cd30ab3a6d95a7
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954066
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954066
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/5e32e0b2-0d0a-478e-bcba-8b1bfadafd26.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/5e32e0b2-0d0a-478e-bcba-8b1bfadafd26.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/5e32e0b2-0d0a-478e-bcba-8b1bfadafd26
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:11:48Z
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 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 0x359ae6e0c25c57a78a3413063808136577d6910e52c3d1d1f6cd30ab3a6d95a7. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5e32e0b2-0d0a-478e-bcba-8b1bfadafd26.json and https://artists.proofprofile.net/proofs/artist/5e32e0b2-0d0a-478e-bcba-8b1bfadafd26.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
album: Kawaribanko
  type: MusicAlbum
  date published: 2023-10-28
album: かわりばんこ
  type: MusicAlbum
  date published: 2023-10-28
album: STRANGE WORLD
  type: MusicAlbum
  date published: 2024-06-22
album: おかしなせかい
  type: MusicAlbum
  date published: 2024-06-22
album: おつかれさまー
  type: MusicAlbum
  date published: 2024-08-21
album: Otsukare summer
  type: MusicAlbum
  date published: 2024-08-21
album: カンケイナイ
  type: MusicAlbum
  date published: 2024-11-23
album: kannkeinai
  type: MusicAlbum
  date published: 2024-11-23
album: 水仙歌
  type: MusicAlbum
  date published: 2025-02-20
album: suisenka
  type: MusicAlbum
  date published: 2025-02-20
  track: suisenka
    type: MusicRecording
    duration: PT3M30S
    duration ms: 210563
    explicit: false
    by artist: W.sayaka
    in album: suisenka
      type: MusicAlbum
      date published: 2025-02-20
    isrc code: TCJPD2594328
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-19T16:24:02+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x9c5f737e7c2d1e74f93e435d72145aecc4e7cf1acfea7a5832600c2dd32ba7fa
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958761
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958761
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPD2594328
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-19T17:49:48Z
    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 0x9c5f737e7c2d1e74f93e435d72145aecc4e7cf1acfea7a5832600c2dd32ba7fa. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/TCJPD2594328.
      date published: 2026-07-19T17:49:48Z
    audio: suisenka
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 107.993
      additional property: Musical Key
        type: PropertyValue
        value: 2
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.709
      additional property: Energy
        type: PropertyValue
        value: 0.819
      additional property: Speechiness
        type: PropertyValue
        value: 0.039
      additional property: Acousticness
        type: PropertyValue
        value: 0.158
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.161
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.582
      additional property: Loudness (dB)
        type: PropertyValue
        value: -4.643
      additional property: Key Name
        type: PropertyValue
        value: D
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: #はじめてのわたし
  type: MusicAlbum
  date published: 2025-06-09
album: #Hajimete no watashi
  type: MusicAlbum
  date published: 2025-06-09
album: 『まだ好き』
  type: MusicAlbum
  date published: 2025-06-28
album: mada_suki
  type: MusicAlbum
  date published: 2025-06-28
album: promise you
  type: MusicAlbum
  date published: 2025-11-05
album: promise you
  type: MusicAlbum
  date published: 2025-11-05