Koharu Rikka
type: MusicGroup
genre: vocaloid
popularity: 17
followers: 1232
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x8f24f5e6ed15ee7fae80d65bda0a2f833dfdf96b86048b968b18b259eaeb6a28
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953648
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953648
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/45d0438c-e444-4e05-bdd7-e1aacdcdc221.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/45d0438c-e444-4e05-bdd7-e1aacdcdc221.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/45d0438c-e444-4e05-bdd7-e1aacdcdc221
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-14T15:20:52Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x8f24f5e6ed15ee7fae80d65bda0a2f833dfdf96b86048b968b18b259eaeb6a28","name":"Koharu Rikka","registered_at":"2026-06-14T11:44:17Z","symbol":"NIM0442473","token_address":"0x826cc421a7d604b2070295c13fe7f7b4a1e1438c","type":"artist","uuid":"45d0438c-e444-4e05-bdd7-e1aacdcdc221"}
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 0x8f24f5e6ed15ee7fae80d65bda0a2f833dfdf96b86048b968b18b259eaeb6a28. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/45d0438c-e444-4e05-bdd7-e1aacdcdc221.json and https://artists.proofprofile.net/proofs/artist/45d0438c-e444-4e05-bdd7-e1aacdcdc221.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-14T15:20:52Z
  text: {"copyright_id":"0x8f24f5e6ed15ee7fae80d65bda0a2f833dfdf96b86048b968b18b259eaeb6a28","name":"Koharu Rikka","registered_at":"2026-06-14T11:44:17Z","symbol":"NIM0442473","token_address":"0x826cc421a7d604b2070295c13fe7f7b4a1e1438c","type":"artist","uuid":"45d0438c-e444-4e05-bdd7-e1aacdcdc221"}
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  type: MusicAlbum
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