八乙女菫 (CV:二ノ宮ゆい)
type: MusicGroup
genre: swing music
popularity: 2
followers: 110
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x9df9103f2d916b975ec22b05d7c52ea1dc399a7987ac4ed4d68d682c2e3b8121
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954667
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954667
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/db51462c-525f-4767-88e5-c63229bc7165.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/db51462c-525f-4767-88e5-c63229bc7165.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/db51462c-525f-4767-88e5-c63229bc7165
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T07:29:20Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x9df9103f2d916b975ec22b05d7c52ea1dc399a7987ac4ed4d68d682c2e3b8121","name":"八乙女菫 (CV:二ノ宮ゆい)","registered_at":"2026-06-21T04:41:00Z","symbol":"NIM1823090","token_address":"0x922df67fa03c67406b3e81cd6997d454e5f16557","type":"artist","uuid":"db51462c-525f-4767-88e5-c63229bc7165"}
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 0x9df9103f2d916b975ec22b05d7c52ea1dc399a7987ac4ed4d68d682c2e3b8121. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/db51462c-525f-4767-88e5-c63229bc7165.json and https://artists.proofprofile.net/proofs/artist/db51462c-525f-4767-88e5-c63229bc7165.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T07:29:20Z
  text: {"copyright_id":"0x9df9103f2d916b975ec22b05d7c52ea1dc399a7987ac4ed4d68d682c2e3b8121","name":"八乙女菫 (CV:二ノ宮ゆい)","registered_at":"2026-06-21T04:41:00Z","symbol":"NIM1823090","token_address":"0x922df67fa03c67406b3e81cd6997d454e5f16557","type":"artist","uuid":"db51462c-525f-4767-88e5-c63229bc7165"}