Does the joint bank account clearly show both your names, and the common address you lived at? Visitor papers will just show you lived in Canada, I don't think they show what address you lived at. If you had ANY mail ever delivered to that address in Canada, a copy of that mail should also be included as well. Also for the 2013 tax year, your spouse needs to change his status with CRA to "common-law", and file taxes with you as his dependent. Once he makes the marital status change (he should have done it the same month you reached 12 months), then can print off the page from online account that shows this. Its another good proof to have.