Marika Siewert
type: MusicGroup
description: Marika (also spelled MARIKA) is a Canadian recording artist, singer, songwriter, actor, and director. MARIKA has had two top 40 radio singles in Canada, as well as songs placed with Elise Estrada, Eli
popularity: 6
followers: 107
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x0dfe1ec8e1665b840809753189e07542dfcc741673b1fb8ced18b9dc6d9819f2
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954130
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954130
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/7bea41bd-1b5f-45d2-b6db-a9abaf73d3b9.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/7bea41bd-1b5f-45d2-b6db-a9abaf73d3b9.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/7bea41bd-1b5f-45d2-b6db-a9abaf73d3b9
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T19:07:14Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x0dfe1ec8e1665b840809753189e07542dfcc741673b1fb8ced18b9dc6d9819f2","name":"Marika Siewert","registered_at":"2026-06-17T08:52:46Z","symbol":"NIM1344142","token_address":"0xd64d634945c86829af4d51ed72cef1e09f88688c","type":"artist","uuid":"7bea41bd-1b5f-45d2-b6db-a9abaf73d3b9"}
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 0x0dfe1ec8e1665b840809753189e07542dfcc741673b1fb8ced18b9dc6d9819f2. Chain 2 (Bitcoin): anchored in block 954174 (2026-06-18T03:01:36Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7bea41bd-1b5f-45d2-b6db-a9abaf73d3b9.json and https://artists.proofprofile.net/proofs/artist/7bea41bd-1b5f-45d2-b6db-a9abaf73d3b9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-18T03:01:36Z
  text: {"copyright_id":"0x0dfe1ec8e1665b840809753189e07542dfcc741673b1fb8ced18b9dc6d9819f2","name":"Marika Siewert","registered_at":"2026-06-17T08:52:46Z","symbol":"NIM1344142","token_address":"0xd64d634945c86829af4d51ed72cef1e09f88688c","type":"artist","uuid":"7bea41bd-1b5f-45d2-b6db-a9abaf73d3b9"}
album: Christmas Is Here
  type: MusicAlbum
  date published: 2021-11-15
album: In Search Of
  type: MusicAlbum
  date published: 2024-01-16