Marjo van Someren
type: MusicGroup
popularity: 5
followers: 101
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x4000f78bb98d50b94f3e55ef5d1091c807f30abdca10ea8f3721b70643bd8613
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/5d83f074-b131-444c-86ab-4efbe6ed64da.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/5d83f074-b131-444c-86ab-4efbe6ed64da.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/5d83f074-b131-444c-86ab-4efbe6ed64da
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:11:48Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x4000f78bb98d50b94f3e55ef5d1091c807f30abdca10ea8f3721b70643bd8613","name":"Marjo van Someren","registered_at":"2026-06-16T22:16:06Z","symbol":"NIM1192278","token_address":"0xe2b1d50586d2786f05b4ae2b433b2be11e935e06","type":"artist","uuid":"5d83f074-b131-444c-86ab-4efbe6ed64da"}
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 0x4000f78bb98d50b94f3e55ef5d1091c807f30abdca10ea8f3721b70643bd8613. 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/5d83f074-b131-444c-86ab-4efbe6ed64da.json and https://artists.proofprofile.net/proofs/artist/5d83f074-b131-444c-86ab-4efbe6ed64da.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
  text: {"copyright_id":"0x4000f78bb98d50b94f3e55ef5d1091c807f30abdca10ea8f3721b70643bd8613","name":"Marjo van Someren","registered_at":"2026-06-16T22:16:06Z","symbol":"NIM1192278","token_address":"0xe2b1d50586d2786f05b4ae2b433b2be11e935e06","type":"artist","uuid":"5d83f074-b131-444c-86ab-4efbe6ed64da"}
album: Let There Be Christmas
  type: MusicAlbum
  date published: 2016-01-11