小嶋 佐和子
type: MusicGroup
popularity: 5
followers: 200
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xc218ac5a76f6f7d7556f160754c61b8d1d61debcc9680b5dda2faae6064152e6
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954667
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954667
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/bbf7ae41-d336-4354-aab5-ea02b799d52d.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/bbf7ae41-d336-4354-aab5-ea02b799d52d.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/bbf7ae41-d336-4354-aab5-ea02b799d52d
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T07:29:20Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xc218ac5a76f6f7d7556f160754c61b8d1d61debcc9680b5dda2faae6064152e6","name":"小嶋 佐和子","registered_at":"2026-06-20T17:39:35Z","symbol":"NIM1668859","token_address":"0xd49c054871b672f5bc3044a69a042bc65d1000bd","type":"artist","uuid":"bbf7ae41-d336-4354-aab5-ea02b799d52d"}
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 0xc218ac5a76f6f7d7556f160754c61b8d1d61debcc9680b5dda2faae6064152e6. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bbf7ae41-d336-4354-aab5-ea02b799d52d.json and https://artists.proofprofile.net/proofs/artist/bbf7ae41-d336-4354-aab5-ea02b799d52d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T07:29:20Z
  text: {"copyright_id":"0xc218ac5a76f6f7d7556f160754c61b8d1d61debcc9680b5dda2faae6064152e6","name":"小嶋 佐和子","registered_at":"2026-06-20T17:39:35Z","symbol":"NIM1668859","token_address":"0xd49c054871b672f5bc3044a69a042bc65d1000bd","type":"artist","uuid":"bbf7ae41-d336-4354-aab5-ea02b799d52d"}
album: 貝のふた
  type: MusicAlbum
  date published: 2014-04-16
album: mon jardin
  type: MusicAlbum
  date published: 2020-06-03
album: Bon Anniversaire
  type: MusicAlbum
  date published: 2025-10-19