Mari Kaneko
type: MusicGroup
genre: city pop
description: is a Japanese female karateka and mixed martial arts (MMA) fighter. Kaneko has competed for MMA promotions Ax, Smackgirl, Deep and Jewels. Background Kaneko was born on in Suwa, Nagano Prefecture,
popularity: 9
followers: 2244
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x6fd3aa11ece9fcc04906e0046120ad34d021cb5938c46b2190116e9de3727d9f
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954066
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954066
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/5ccf277d-732e-47b8-8a6c-cd2574882dac.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/5ccf277d-732e-47b8-8a6c-cd2574882dac.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/5ccf277d-732e-47b8-8a6c-cd2574882dac
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:11:48Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x6fd3aa11ece9fcc04906e0046120ad34d021cb5938c46b2190116e9de3727d9f","name":"Mari Kaneko","registered_at":"2026-06-16T21:51:31Z","symbol":"NIM1186412","token_address":"0x4d9514ae82187cff1f8f74f9611c79c401967913","type":"artist","uuid":"5ccf277d-732e-47b8-8a6c-cd2574882dac"}
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fd3aa11ece9fcc04906e0046120ad34d021cb5938c46b2190116e9de3727d9f. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5ccf277d-732e-47b8-8a6c-cd2574882dac.json and https://artists.proofprofile.net/proofs/artist/5ccf277d-732e-47b8-8a6c-cd2574882dac.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
  text: {"copyright_id":"0x6fd3aa11ece9fcc04906e0046120ad34d021cb5938c46b2190116e9de3727d9f","name":"Mari Kaneko","registered_at":"2026-06-16T21:51:31Z","symbol":"NIM1186412","token_address":"0x4d9514ae82187cff1f8f74f9611c79c401967913","type":"artist","uuid":"5ccf277d-732e-47b8-8a6c-cd2574882dac"}
album: Kanekona Riyu
  type: MusicAlbum
  date published: 2008-02-20
album: MARI FIRST (2004 Remaster)
  type: MusicAlbum
  date published: 1983-09-21