広瀬大地
type: MusicGroup
genre: city pop
popularity: 4
followers: 1273
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xe2e6454d7d0b2909bc4c150415a140d7d4acb7b378ed798332337d66c71cf514
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953997
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953997
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/23b8ef74-28fa-4dab-8a47-174fcc07316e.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/23b8ef74-28fa-4dab-8a47-174fcc07316e.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/23b8ef74-28fa-4dab-8a47-174fcc07316e
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T20:07:57Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xe2e6454d7d0b2909bc4c150415a140d7d4acb7b378ed798332337d66c71cf514","name":"広瀬大地","registered_at":"2026-06-16T02:00:50Z","symbol":"NIM0902231","token_address":"0x8fab70026705b56e15ee12bff19da27acfcb42b2","type":"artist","uuid":"23b8ef74-28fa-4dab-8a47-174fcc07316e"}
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 0xe2e6454d7d0b2909bc4c150415a140d7d4acb7b378ed798332337d66c71cf514. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/23b8ef74-28fa-4dab-8a47-174fcc07316e.json and https://artists.proofprofile.net/proofs/artist/23b8ef74-28fa-4dab-8a47-174fcc07316e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T20:07:57Z
  text: {"copyright_id":"0xe2e6454d7d0b2909bc4c150415a140d7d4acb7b378ed798332337d66c71cf514","name":"広瀬大地","registered_at":"2026-06-16T02:00:50Z","symbol":"NIM0902231","token_address":"0x8fab70026705b56e15ee12bff19da27acfcb42b2","type":"artist","uuid":"23b8ef74-28fa-4dab-8a47-174fcc07316e"}
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