成田 賢
type: MusicGroup
popularity: 15
followers: 704
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xacbd4581b0df02b5bab0cee57cca6828c6ebd6a9b46c495b94ff6444a74e01e3
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/485899f0-d045-4246-92ea-b69aaab319c6.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/485899f0-d045-4246-92ea-b69aaab319c6.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/485899f0-d045-4246-92ea-b69aaab319c6
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-14T15:20:52Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xacbd4581b0df02b5bab0cee57cca6828c6ebd6a9b46c495b94ff6444a74e01e3","name":"成田 賢","registered_at":"2026-06-14T12:00:01Z","symbol":"NIM0446235","token_address":"0x120b314b07e7879b122900e52ca4bc06cf8c306a","type":"artist","uuid":"485899f0-d045-4246-92ea-b69aaab319c6"}
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 0xacbd4581b0df02b5bab0cee57cca6828c6ebd6a9b46c495b94ff6444a74e01e3. 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/485899f0-d045-4246-92ea-b69aaab319c6.json and https://artists.proofprofile.net/proofs/artist/485899f0-d045-4246-92ea-b69aaab319c6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-14T15:20:52Z
  text: {"copyright_id":"0xacbd4581b0df02b5bab0cee57cca6828c6ebd6a9b46c495b94ff6444a74e01e3","name":"成田 賢","registered_at":"2026-06-14T12:00:01Z","symbol":"NIM0446235","token_address":"0x120b314b07e7879b122900e52ca4bc06cf8c306a","type":"artist","uuid":"485899f0-d045-4246-92ea-b69aaab319c6"}
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  type: MusicAlbum
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  type: MusicAlbum
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  type: MusicAlbum
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  date published: 2009-04-10