Masayo Koketsu
type: MusicGroup
genre: avant-garde
genre: free jazz
popularity: 3
followers: 89
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xa66261325b3f2abe9e27c0560566880d8c344219d72ae00097019fc34c730ce5
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954043
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954043
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/3fe8dfbf-1fd7-4cc8-95e1-7cbc1a1b3233.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/3fe8dfbf-1fd7-4cc8-95e1-7cbc1a1b3233.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/3fe8dfbf-1fd7-4cc8-95e1-7cbc1a1b3233
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T04:15:20Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xa66261325b3f2abe9e27c0560566880d8c344219d72ae00097019fc34c730ce5","name":"Masayo Koketsu","registered_at":"2026-06-16T11:50:58Z","symbol":"NIM1043125","token_address":"0xaa20d4168277e6c55e91bcdaf15d84d44db5987e","type":"artist","uuid":"3fe8dfbf-1fd7-4cc8-95e1-7cbc1a1b3233"}
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 0xa66261325b3f2abe9e27c0560566880d8c344219d72ae00097019fc34c730ce5. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3fe8dfbf-1fd7-4cc8-95e1-7cbc1a1b3233.json and https://artists.proofprofile.net/proofs/artist/3fe8dfbf-1fd7-4cc8-95e1-7cbc1a1b3233.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:10:43Z
  text: {"copyright_id":"0xa66261325b3f2abe9e27c0560566880d8c344219d72ae00097019fc34c730ce5","name":"Masayo Koketsu","registered_at":"2026-06-16T11:50:58Z","symbol":"NIM1043125","token_address":"0xaa20d4168277e6c55e91bcdaf15d84d44db5987e","type":"artist","uuid":"3fe8dfbf-1fd7-4cc8-95e1-7cbc1a1b3233"}
album: FUKIYA
  type: MusicAlbum
  date published: 2022-05-20
album: Poiēsis
  type: MusicAlbum
  date published: 2025-04-25