大久保 博
type: MusicGroup
popularity: 4
followers: 44
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x01921ea7fae2c31cd2da86c57da598c7c116617b469e2ccbff46ef000d45ad1b
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954742
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954742
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/ff47f4b4-aadc-499b-8a20-13d8689474a1.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/ff47f4b4-aadc-499b-8a20-13d8689474a1.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/ff47f4b4-aadc-499b-8a20-13d8689474a1
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T20:46:40Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x01921ea7fae2c31cd2da86c57da598c7c116617b469e2ccbff46ef000d45ad1b","name":"大久保 博","registered_at":"2026-06-21T18:31:27Z","symbol":"NIM2000289","token_address":"0xdf7bb84faff2b917091a9857f4b1338248e2a0b6","type":"artist","uuid":"ff47f4b4-aadc-499b-8a20-13d8689474a1"}
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 0x01921ea7fae2c31cd2da86c57da598c7c116617b469e2ccbff46ef000d45ad1b. Chain 2 (Bitcoin): anchored in block 954742 (2026-06-21T20:46:40Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ff47f4b4-aadc-499b-8a20-13d8689474a1.json and https://artists.proofprofile.net/proofs/artist/ff47f4b4-aadc-499b-8a20-13d8689474a1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T20:46:40Z
  text: {"copyright_id":"0x01921ea7fae2c31cd2da86c57da598c7c116617b469e2ccbff46ef000d45ad1b","name":"大久保 博","registered_at":"2026-06-21T18:31:27Z","symbol":"NIM2000289","token_address":"0xdf7bb84faff2b917091a9857f4b1338248e2a0b6","type":"artist","uuid":"ff47f4b4-aadc-499b-8a20-13d8689474a1"}