Indian passport, both US B1?
Yes you can certainly do that. Having a visa does not guarantee admission. It is still at the POE officials discretion. While I see no reason for you to be denied entey into the US or back into Canada, there is a possibility of both, although very low. Please have your hotel booking, credit card or some cash in case they ask you how will you support yourself in the US. Same could happen when returning back to Canada but presumably you already have that figurd out if you are already living there as a visitor. Again, the chances of having a problem are very low. I would not change my plans but be prepared to explain why you are doing/did this trip, where will you live etc.