Toshiko Yonekawa
type: MusicGroup
genre: japanese classical
genre: traditional music
popularity: 26
followers: 982
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x35fc029fb23ea90f3a33c2f897a7cf2a1e077cb778ac5b02528c3d4b38712d11
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953407
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953407
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/c959462b-ab0d-421a-a793-75f0c4a50c49.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/c959462b-ab0d-421a-a793-75f0c4a50c49.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/c959462b-ab0d-421a-a793-75f0c4a50c49
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-12T19:24:56Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x35fc029fb23ea90f3a33c2f897a7cf2a1e077cb778ac5b02528c3d4b38712d11","name":"Toshiko Yonekawa","registered_at":"2026-06-12T09:44:27Z","symbol":"NIM0259897","token_address":"0xcaadaefe430b8b74f08fd19a928bf4b110d4f86d","type":"artist","uuid":"c959462b-ab0d-421a-a793-75f0c4a50c49"}
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 0x35fc029fb23ea90f3a33c2f897a7cf2a1e077cb778ac5b02528c3d4b38712d11. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c959462b-ab0d-421a-a793-75f0c4a50c49.json and https://artists.proofprofile.net/proofs/artist/c959462b-ab0d-421a-a793-75f0c4a50c49.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-12T19:28:13Z
  text: {"copyright_id":"0x35fc029fb23ea90f3a33c2f897a7cf2a1e077cb778ac5b02528c3d4b38712d11","name":"Toshiko Yonekawa","registered_at":"2026-06-12T09:44:27Z","symbol":"NIM0259897","token_address":"0xcaadaefe430b8b74f08fd19a928bf4b110d4f86d","type":"artist","uuid":"c959462b-ab0d-421a-a793-75f0c4a50c49"}
album: Popular Koto Melodies Of Japan (Remastered)
  type: MusicAlbum
  date published: 2011-12-29