坂木しずか
type: MusicGroup
genre: anime
popularity: 6
followers: 8
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x50708dcf0f9616ed6c34a9e77835da9ff08b5127c296aa0d5a5b9c9b895d03d1
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953864
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953864
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/04352f8d-0e7e-4343-a110-f58dd606efa5.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/04352f8d-0e7e-4343-a110-f58dd606efa5.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/04352f8d-0e7e-4343-a110-f58dd606efa5
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T00:30:31Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x50708dcf0f9616ed6c34a9e77835da9ff08b5127c296aa0d5a5b9c9b895d03d1","name":"坂木しずか","registered_at":"2026-06-15T15:03:29Z","symbol":"NIM0745353","token_address":"0xcb6212cac21f81f86904b43bed82a237a6b7864d","type":"artist","uuid":"04352f8d-0e7e-4343-a110-f58dd606efa5"}
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 0x50708dcf0f9616ed6c34a9e77835da9ff08b5127c296aa0d5a5b9c9b895d03d1. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/04352f8d-0e7e-4343-a110-f58dd606efa5.json and https://artists.proofprofile.net/proofs/artist/04352f8d-0e7e-4343-a110-f58dd606efa5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T07:53:13Z
  text: {"copyright_id":"0x50708dcf0f9616ed6c34a9e77835da9ff08b5127c296aa0d5a5b9c9b895d03d1","name":"坂木しずか","registered_at":"2026-06-15T15:03:29Z","symbol":"NIM0745353","token_address":"0xcb6212cac21f81f86904b43bed82a237a6b7864d","type":"artist","uuid":"04352f8d-0e7e-4343-a110-f58dd606efa5"}