What document lists the owner and purpose of the aircraft?

The Certificate of Registration is the correct document that lists the owner of the aircraft and provides important details about its registration, including the purpose it is primarily used for. This document serves as proof that the aircraft is officially registered within the national aviation authority, which in Canada is Transport Canada. It contains information such as the aircraft's registration number, the name of the registered owner, and any applicable conditions or limitations pertaining to its use.

In contrast, the Airworthiness Certificate reflects the aircraft's compliance with safety standards and its fitness to fly, but it does not include ownership details. The Technical Logbook is focused on documenting maintenance, repairs, and any work done on the aircraft, while the Journey Logbook is used to record the details of flights operated, including flight times and crew information, but again does not contain ownership information. Thus, the Certificate of Registration is the definitive source for information regarding ownership and the aircraft's intended use.