Toshiki Kumagai
type: MusicGroup
description: is a Japanese actor from Kurashiki, affiliated with Avex Pictures. He appeared in several music events and in musicals as a child actor, and his foreign dub roles include young Simba in the 2019 Disn
popularity: 30
followers: 214
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x0f710f46a149349d473e11789aeb2fbd97f5732360f6dea47ee6d17ee116c87c
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953407
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953407
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/8f6c20d3-2f36-4c1b-a13c-9107015e73ab.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/8f6c20d3-2f36-4c1b-a13c-9107015e73ab.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/8f6c20d3-2f36-4c1b-a13c-9107015e73ab
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-12T19:24:56Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x0f710f46a149349d473e11789aeb2fbd97f5732360f6dea47ee6d17ee116c87c","name":"Toshiki Kumagai","registered_at":"2026-06-12T04:19:53Z","symbol":"NIM0184937","token_address":"0xe30db5a5698898253fb6f38c4d7f2e08b294310c","type":"artist","uuid":"8f6c20d3-2f36-4c1b-a13c-9107015e73ab"}
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 0x0f710f46a149349d473e11789aeb2fbd97f5732360f6dea47ee6d17ee116c87c. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8f6c20d3-2f36-4c1b-a13c-9107015e73ab.json and https://artists.proofprofile.net/proofs/artist/8f6c20d3-2f36-4c1b-a13c-9107015e73ab.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-12T21:20:00Z
  text: {"copyright_id":"0x0f710f46a149349d473e11789aeb2fbd97f5732360f6dea47ee6d17ee116c87c","name":"Toshiki Kumagai","registered_at":"2026-06-12T04:19:53Z","symbol":"NIM0184937","token_address":"0xe30db5a5698898253fb6f38c4d7f2e08b294310c","type":"artist","uuid":"8f6c20d3-2f36-4c1b-a13c-9107015e73ab"}