Sakada Kei
type: MusicGroup
genre: vocaloid
popularity: 2
followers: 49
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x28e10d6f75ccde484edb254812dc50140932a0723a7b403e483396f2f113dec7
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953896
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953896
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/104346d9-e15e-4a5b-a158-02a67de6084f.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/104346d9-e15e-4a5b-a158-02a67de6084f.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/104346d9-e15e-4a5b-a158-02a67de6084f
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T06:05:56Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x28e10d6f75ccde484edb254812dc50140932a0723a7b403e483396f2f113dec7","name":"Sakada Kei","registered_at":"2026-06-15T19:15:35Z","symbol":"NIM0805527","token_address":"0x5bcf9c15fa1ecd1fe2ca2c3847ce5127f3973f7a","type":"artist","uuid":"104346d9-e15e-4a5b-a158-02a67de6084f"}
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 0x28e10d6f75ccde484edb254812dc50140932a0723a7b403e483396f2f113dec7. Chain 2 (Bitcoin): anchored in block 953896 (2026-06-16T06:05:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/104346d9-e15e-4a5b-a158-02a67de6084f.json and https://artists.proofprofile.net/proofs/artist/104346d9-e15e-4a5b-a158-02a67de6084f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T06:05:56Z
  text: {"copyright_id":"0x28e10d6f75ccde484edb254812dc50140932a0723a7b403e483396f2f113dec7","name":"Sakada Kei","registered_at":"2026-06-15T19:15:35Z","symbol":"NIM0805527","token_address":"0x5bcf9c15fa1ecd1fe2ca2c3847ce5127f3973f7a","type":"artist","uuid":"104346d9-e15e-4a5b-a158-02a67de6084f"}
album: A Mutant in the Corner
  type: MusicAlbum
  date published: 2024-07-20