馬場宏樹
type: MusicGroup
genre: japanese indie
popularity: 6
followers: 87
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x5effee41b26db0b953767fe2b6be00a4ad3c2d86fdc519eed659cf5ffdf18f1d
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954500
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954500
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/9b494723-e0fd-47c6-b83f-08b4e88b186c.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/9b494723-e0fd-47c6-b83f-08b4e88b186c.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/9b494723-e0fd-47c6-b83f-08b4e88b186c
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T04:47:29Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x5effee41b26db0b953767fe2b6be00a4ad3c2d86fdc519eed659cf5ffdf18f1d","name":"馬場宏樹","registered_at":"2026-06-20T03:48:05Z","symbol":"NIM1501766","token_address":"0x67c281e500b47bc636454a0dac53a3307637d4a8","type":"artist","uuid":"9b494723-e0fd-47c6-b83f-08b4e88b186c"}
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 0x5effee41b26db0b953767fe2b6be00a4ad3c2d86fdc519eed659cf5ffdf18f1d. Chain 2 (Bitcoin): anchored in block 954500 (2026-06-20T04:47:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9b494723-e0fd-47c6-b83f-08b4e88b186c.json and https://artists.proofprofile.net/proofs/artist/9b494723-e0fd-47c6-b83f-08b4e88b186c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T04:47:29Z
  text: {"copyright_id":"0x5effee41b26db0b953767fe2b6be00a4ad3c2d86fdc519eed659cf5ffdf18f1d","name":"馬場宏樹","registered_at":"2026-06-20T03:48:05Z","symbol":"NIM1501766","token_address":"0x67c281e500b47bc636454a0dac53a3307637d4a8","type":"artist","uuid":"9b494723-e0fd-47c6-b83f-08b4e88b186c"}