Toshio Sudama
type: MusicGroup
popularity: 7
followers: 43
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x4848e730723108e78b402a83bd9f2fb5f95d5042c43d5464a05e351ced99aa76
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953959
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953959
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/269c8d7e-a257-442a-80e1-5530e7907f92.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/269c8d7e-a257-442a-80e1-5530e7907f92.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/269c8d7e-a257-442a-80e1-5530e7907f92
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T14:51:55Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x4848e730723108e78b402a83bd9f2fb5f95d5042c43d5464a05e351ced99aa76","name":"Toshio Sudama","registered_at":"2026-06-16T03:17:14Z","symbol":"NIM0920474","token_address":"0x37914d6224975958d2d097296d2d9bee50095bcf","type":"artist","uuid":"269c8d7e-a257-442a-80e1-5530e7907f92"}
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 0x4848e730723108e78b402a83bd9f2fb5f95d5042c43d5464a05e351ced99aa76. Chain 2 (Bitcoin): anchored in block 953959 (2026-06-16T14:51:55Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/269c8d7e-a257-442a-80e1-5530e7907f92.json and https://artists.proofprofile.net/proofs/artist/269c8d7e-a257-442a-80e1-5530e7907f92.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T14:51:55Z
  text: {"copyright_id":"0x4848e730723108e78b402a83bd9f2fb5f95d5042c43d5464a05e351ced99aa76","name":"Toshio Sudama","registered_at":"2026-06-16T03:17:14Z","symbol":"NIM0920474","token_address":"0x37914d6224975958d2d097296d2d9bee50095bcf","type":"artist","uuid":"269c8d7e-a257-442a-80e1-5530e7907f92"}
album: Companion
  type: MusicAlbum
  date published: 2020-11-14