David Christensen
type: MusicGroup
description: David Christensen is an Alberta film director and producer who since October 2007 has been an executive producer with the National Film Board of Canada (NFB) at its Northwest Centre, based in Edmonton
popularity: 16
followers: 32
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x18cd95101c238d8ece54b56a6c25c89b20d2e7248391886b0acc14d2b3419baf
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953697
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953697
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/707f8146-3058-417b-bf45-4ff9f3be035f.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/707f8146-3058-417b-bf45-4ff9f3be035f.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/707f8146-3058-417b-bf45-4ff9f3be035f
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-14T21:49:28Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x18cd95101c238d8ece54b56a6c25c89b20d2e7248391886b0acc14d2b3419baf","name":"David Christensen","registered_at":"2026-06-14T16:18:20Z","symbol":"NIM0507878","token_address":"0x03d7aa6a8d147a2197afb3661b535883cc370e81","type":"artist","uuid":"707f8146-3058-417b-bf45-4ff9f3be035f"}
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 0x18cd95101c238d8ece54b56a6c25c89b20d2e7248391886b0acc14d2b3419baf. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/707f8146-3058-417b-bf45-4ff9f3be035f.json and https://artists.proofprofile.net/proofs/artist/707f8146-3058-417b-bf45-4ff9f3be035f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-14T22:00:24Z
  text: {"copyright_id":"0x18cd95101c238d8ece54b56a6c25c89b20d2e7248391886b0acc14d2b3419baf","name":"David Christensen","registered_at":"2026-06-14T16:18:20Z","symbol":"NIM0507878","token_address":"0x03d7aa6a8d147a2197afb3661b535883cc370e81","type":"artist","uuid":"707f8146-3058-417b-bf45-4ff9f3be035f"}