Sawako Kojima
type: MusicGroup
popularity: 5
followers: 29
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xc55d36f1c161740016aef9caac75bbaf24b877451b19950041b79cc1eea48427
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954065
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954065
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/3c2702c7-658d-43cf-9a86-cfdd4d1944f8.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/3c2702c7-658d-43cf-9a86-cfdd4d1944f8.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/3c2702c7-658d-43cf-9a86-cfdd4d1944f8
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:10:43Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xc55d36f1c161740016aef9caac75bbaf24b877451b19950041b79cc1eea48427","name":"Sawako Kojima","registered_at":"2026-06-16T10:30:41Z","symbol":"NIM1023989","token_address":"0xe6cf5198ab857ffc78d4d1b779fb98cf46a0950f","type":"artist","uuid":"3c2702c7-658d-43cf-9a86-cfdd4d1944f8"}
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 0xc55d36f1c161740016aef9caac75bbaf24b877451b19950041b79cc1eea48427. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3c2702c7-658d-43cf-9a86-cfdd4d1944f8.json and https://artists.proofprofile.net/proofs/artist/3c2702c7-658d-43cf-9a86-cfdd4d1944f8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
  text: {"copyright_id":"0xc55d36f1c161740016aef9caac75bbaf24b877451b19950041b79cc1eea48427","name":"Sawako Kojima","registered_at":"2026-06-16T10:30:41Z","symbol":"NIM1023989","token_address":"0xe6cf5198ab857ffc78d4d1b779fb98cf46a0950f","type":"artist","uuid":"3c2702c7-658d-43cf-9a86-cfdd4d1944f8"}
album: seashell's lid
  type: MusicAlbum
  date published: 2014-04-16
album: mon jardin
  type: MusicAlbum
  date published: 2020-06-03
album: Bon Anniversaire
  type: MusicAlbum
  date published: 2025-01-10
album: Bon Anniversaire
  type: MusicAlbum
  date published: 2025-10-19