小坂一也
type: MusicGroup
genre: j-rock
genre: kayokyoku
popularity: 2
followers: 108
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x8eda3a21f81bd3724aeecb01272bf1ac66fbef0f4a853303228db842dee2693a
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954342
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954342
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/91231b0c-0c71-413e-9d0c-086de917d61a.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/91231b0c-0c71-413e-9d0c-086de917d61a.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/91231b0c-0c71-413e-9d0c-086de917d61a
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-19T03:22:39Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x8eda3a21f81bd3724aeecb01272bf1ac66fbef0f4a853303228db842dee2693a","name":"小坂一也","registered_at":"2026-06-17T16:19:29Z","symbol":"NIM1450649","token_address":"0x2c445c6a927e18a3f18f5ec6c9b65dd9bc525cc9","type":"artist","uuid":"91231b0c-0c71-413e-9d0c-086de917d61a"}
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 0x8eda3a21f81bd3724aeecb01272bf1ac66fbef0f4a853303228db842dee2693a. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/91231b0c-0c71-413e-9d0c-086de917d61a.json and https://artists.proofprofile.net/proofs/artist/91231b0c-0c71-413e-9d0c-086de917d61a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-19T03:22:39Z
  text: {"copyright_id":"0x8eda3a21f81bd3724aeecb01272bf1ac66fbef0f4a853303228db842dee2693a","name":"小坂一也","registered_at":"2026-06-17T16:19:29Z","symbol":"NIM1450649","token_address":"0x2c445c6a927e18a3f18f5ec6c9b65dd9bc525cc9","type":"artist","uuid":"91231b0c-0c71-413e-9d0c-086de917d61a"}
album: 今、いちばんのありがとう
  type: MusicAlbum
  date published: 1991-09-21
album: 優しく愛して
  type: MusicAlbum
  date published: 1993-03-21
album: 微笑みの作り方
  type: MusicAlbum
  date published: 1994-03-21