長岡利香子
type: MusicGroup
genre: choral
popularity: 16
followers: 49
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x450d66d19ce8d583258687728924906f5a6e8837e167853ac72e81e49f0dd5af
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953817
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953817
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/fe6624e7-5f9e-492c-b9b9-5cae6d2b8fce.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/fe6624e7-5f9e-492c-b9b9-5cae6d2b8fce.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/fe6624e7-5f9e-492c-b9b9-5cae6d2b8fce
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-15T18:10:31Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x450d66d19ce8d583258687728924906f5a6e8837e167853ac72e81e49f0dd5af","name":"長岡利香子","registered_at":"2026-06-15T07:14:10Z","symbol":"NIM0721662","token_address":"0x5ca43faeac7581c10c7bc0010be39c58933deea6","type":"artist","uuid":"fe6624e7-5f9e-492c-b9b9-5cae6d2b8fce"}
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 0x450d66d19ce8d583258687728924906f5a6e8837e167853ac72e81e49f0dd5af. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fe6624e7-5f9e-492c-b9b9-5cae6d2b8fce.json and https://artists.proofprofile.net/proofs/artist/fe6624e7-5f9e-492c-b9b9-5cae6d2b8fce.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-15T22:22:30Z
  text: {"copyright_id":"0x450d66d19ce8d583258687728924906f5a6e8837e167853ac72e81e49f0dd5af","name":"長岡利香子","registered_at":"2026-06-15T07:14:10Z","symbol":"NIM0721662","token_address":"0x5ca43faeac7581c10c7bc0010be39c58933deea6","type":"artist","uuid":"fe6624e7-5f9e-492c-b9b9-5cae6d2b8fce"}