I am a long-haul truck driver working permanently full-time for a Transport company. I am being paid on the basis of running miles not by hourly. Now, I have completed my one year of work experience and qualify to apply under Canadian Experience Class. How can I prove that I worked full-time (30 hours/week)?
You can make use of your log book to count number of hours you worked. Every long haul truck driver has his own record of logged hours they drive truck, in a digital or physical booklet. Apart from this, you can find this record with your employer as well.
In my opinion, a job verification / reference letter from your employer mentioning the number of hours and your log book record would be sufficient proof of a full-time work.