須関裕子（ピアノ）
type: MusicGroup
genre: classical piano
popularity: 7
followers: 10
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xd08a229436a0064d5f6e0b4986ec18475453ed6054cb0af94e13d6baa0489c0e
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954028
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954028
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/39474dc7-bf32-448d-ac3c-123d9ccdf309.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/39474dc7-bf32-448d-ac3c-123d9ccdf309.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/39474dc7-bf32-448d-ac3c-123d9ccdf309
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T01:08:06Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xd08a229436a0064d5f6e0b4986ec18475453ed6054cb0af94e13d6baa0489c0e","name":"須関裕子（ピアノ）","registered_at":"2026-06-16T09:30:50Z","symbol":"NIM1009688","token_address":"0x1a21439413ea69d1ed6e34a6187a3ebd66928f0d","type":"artist","uuid":"39474dc7-bf32-448d-ac3c-123d9ccdf309"}
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 0xd08a229436a0064d5f6e0b4986ec18475453ed6054cb0af94e13d6baa0489c0e. Chain 2 (Bitcoin): anchored in block 954028 (2026-06-17T01:08:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/39474dc7-bf32-448d-ac3c-123d9ccdf309.json and https://artists.proofprofile.net/proofs/artist/39474dc7-bf32-448d-ac3c-123d9ccdf309.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T01:08:06Z
  text: {"copyright_id":"0xd08a229436a0064d5f6e0b4986ec18475453ed6054cb0af94e13d6baa0489c0e","name":"須関裕子（ピアノ）","registered_at":"2026-06-16T09:30:50Z","symbol":"NIM1009688","token_address":"0x1a21439413ea69d1ed6e34a6187a3ebd66928f0d","type":"artist","uuid":"39474dc7-bf32-448d-ac3c-123d9ccdf309"}
album: ラ・カンパネッラ
  type: MusicAlbum
  date published: 2018-02-24
album: La Camoanella
  type: MusicAlbum
  date published: 2018-02-24