Marcel Nicolajevich Verhoeff
type: MusicGroup
popularity: 4
followers: 276
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x2cdb6557aaf8093989e62572d96d49d3ef30a249670f52802aee47b7992ad70a
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954569
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954569
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b228aa9b-512a-45d6-b5cf-74b7bf5715ac.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b228aa9b-512a-45d6-b5cf-74b7bf5715ac.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/b228aa9b-512a-45d6-b5cf-74b7bf5715ac
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T14:36:29Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x2cdb6557aaf8093989e62572d96d49d3ef30a249670f52802aee47b7992ad70a","name":"Marcel Nicolajevich Verhoeff","registered_at":"2026-06-20T12:27:50Z","symbol":"NIM1613083","token_address":"0x8da67dbd1fe92618387370bb4319e8e3fd1fd3bd","type":"artist","uuid":"b228aa9b-512a-45d6-b5cf-74b7bf5715ac"}
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 0x2cdb6557aaf8093989e62572d96d49d3ef30a249670f52802aee47b7992ad70a. Chain 2 (Bitcoin): anchored in block 954569 (2026-06-20T14:36:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b228aa9b-512a-45d6-b5cf-74b7bf5715ac.json and https://artists.proofprofile.net/proofs/artist/b228aa9b-512a-45d6-b5cf-74b7bf5715ac.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T14:36:29Z
  text: {"copyright_id":"0x2cdb6557aaf8093989e62572d96d49d3ef30a249670f52802aee47b7992ad70a","name":"Marcel Nicolajevich Verhoeff","registered_at":"2026-06-20T12:27:50Z","symbol":"NIM1613083","token_address":"0x8da67dbd1fe92618387370bb4319e8e3fd1fd3bd","type":"artist","uuid":"b228aa9b-512a-45d6-b5cf-74b7bf5715ac"}
album: On the river Don: Choir of the Don Cossacks
  type: MusicAlbum
  date published: 1998-08-18
album: Christmas in Russia
  type: MusicAlbum
  date published: 2011-05-03
album: A Russian Romance
  type: MusicAlbum
  date published: 2011-11-01