河野勇作
type: MusicGroup
popularity: 7
followers: 19
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xaf84687b7cf745e6db3320b3f240274ee998ff0b57ca7524dbb6edda52f2c490
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954631
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954631
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/cee738e5-6dfb-4d72-8b6a-5bc2990e1a44.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/cee738e5-6dfb-4d72-8b6a-5bc2990e1a44.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/cee738e5-6dfb-4d72-8b6a-5bc2990e1a44
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T02:46:24Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xaf84687b7cf745e6db3320b3f240274ee998ff0b57ca7524dbb6edda52f2c490","name":"河野勇作","registered_at":"2026-06-21T00:12:19Z","symbol":"NIM1758795","token_address":"0x810ca2f33245680b07adc4f4d160b5e6c49b8367","type":"artist","uuid":"cee738e5-6dfb-4d72-8b6a-5bc2990e1a44"}
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 0xaf84687b7cf745e6db3320b3f240274ee998ff0b57ca7524dbb6edda52f2c490. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cee738e5-6dfb-4d72-8b6a-5bc2990e1a44.json and https://artists.proofprofile.net/proofs/artist/cee738e5-6dfb-4d72-8b6a-5bc2990e1a44.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T02:46:24Z
  text: {"copyright_id":"0xaf84687b7cf745e6db3320b3f240274ee998ff0b57ca7524dbb6edda52f2c490","name":"河野勇作","registered_at":"2026-06-21T00:12:19Z","symbol":"NIM1758795","token_address":"0x810ca2f33245680b07adc4f4d160b5e6c49b8367","type":"artist","uuid":"cee738e5-6dfb-4d72-8b6a-5bc2990e1a44"}