It is always a mixture of various proof that will provide the best evidence. Most don’t go to the doctor frequently enough to prove residency alone but if you have proof that someone went to multiple doctor’s appointment per year that would prove they were in Canada (remote appointment after the height of covid are not that common and in some provinces you can’t bill for them anymore). Bank statements should have more regular transactions but someone else could technically be using your bank card. If you combine both proof that makes proof of residency very strong. If you have both I wouldn’t worry too much.