Maruyama Yuki
type: MusicGroup
popularity: 22
followers: 185
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xf180705e3729136426c494cd79ac0cd603fb4dc2cc2a75c0ced29a7c3720a5f5
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/d2694064-ea1a-4fea-b1ae-d58cdbacf7ec.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/d2694064-ea1a-4fea-b1ae-d58cdbacf7ec.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/d2694064-ea1a-4fea-b1ae-d58cdbacf7ec
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-12T19:24:56Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xf180705e3729136426c494cd79ac0cd603fb4dc2cc2a75c0ced29a7c3720a5f5","name":"Maruyama Yuki","registered_at":"2026-06-12T10:32:21Z","symbol":"NIM0270989","token_address":"0x9c129b70fbc9424fc10b1e6a9753ded4c2d1b36c","type":"artist","uuid":"d2694064-ea1a-4fea-b1ae-d58cdbacf7ec"}
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 0xf180705e3729136426c494cd79ac0cd603fb4dc2cc2a75c0ced29a7c3720a5f5. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d2694064-ea1a-4fea-b1ae-d58cdbacf7ec.json and https://artists.proofprofile.net/proofs/artist/d2694064-ea1a-4fea-b1ae-d58cdbacf7ec.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
  date published: 2026-06-12T19:24:56Z
  text: {"copyright_id":"0xf180705e3729136426c494cd79ac0cd603fb4dc2cc2a75c0ced29a7c3720a5f5","name":"Maruyama Yuki","registered_at":"2026-06-12T10:32:21Z","symbol":"NIM0270989","token_address":"0x9c129b70fbc9424fc10b1e6a9753ded4c2d1b36c","type":"artist","uuid":"d2694064-ea1a-4fea-b1ae-d58cdbacf7ec"}
album: Maruland: Death of a Friendship
  type: MusicAlbum
  date published: 2020-10-31
album: 7 PM
  type: MusicAlbum
  date published: 2020-12-11
album: A Ghost Am I
  type: MusicAlbum
  date published: 2022-06-06
album: Lost Gold
  type: MusicAlbum
  date published: 2022-06-27
album: The Haunt of Maruyama Yuki
  type: MusicAlbum
  date published: 2022-10-31
album: Morgue EP
  type: MusicAlbum
  date published: 2023-07-30
album: Francesca
  type: MusicAlbum
  date published: 2024-05-28
album: 7PM
  type: MusicAlbum
  date published: 2025-10-08