九條 楓（CV：佳村はるか）
type: MusicGroup
popularity: 4
followers: 61
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x9856ed73112ae92824ae8f782b51f6e50a8956db5646ebc51655429a818526b8
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954008
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954008
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/336eadbe-9d59-4ea4-bb86-b26bd45674f3.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/336eadbe-9d59-4ea4-bb86-b26bd45674f3.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/336eadbe-9d59-4ea4-bb86-b26bd45674f3
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T21:31:27Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x9856ed73112ae92824ae8f782b51f6e50a8956db5646ebc51655429a818526b8","name":"九條 楓（CV：佳村はるか）","registered_at":"2026-06-16T07:29:25Z","symbol":"NIM0980712","token_address":"0xcee0f081a8eddcdeceee04f4051787aa469f44cf","type":"artist","uuid":"336eadbe-9d59-4ea4-bb86-b26bd45674f3"}
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 0x9856ed73112ae92824ae8f782b51f6e50a8956db5646ebc51655429a818526b8. Chain 2 (Bitcoin): anchored in block 954008 (2026-06-16T21:31:27Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/336eadbe-9d59-4ea4-bb86-b26bd45674f3.json and https://artists.proofprofile.net/proofs/artist/336eadbe-9d59-4ea4-bb86-b26bd45674f3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T21:31:27Z
  text: {"copyright_id":"0x9856ed73112ae92824ae8f782b51f6e50a8956db5646ebc51655429a818526b8","name":"九條 楓（CV：佳村はるか）","registered_at":"2026-06-16T07:29:25Z","symbol":"NIM0980712","token_address":"0xcee0f081a8eddcdeceee04f4051787aa469f44cf","type":"artist","uuid":"336eadbe-9d59-4ea4-bb86-b26bd45674f3"}