I think another question would be, if you want to go practice in the US... do US hospitals look up stuff from Canada? You may need to just move to US. That's going to take some investigation, but I can't find anything from a cursory search online.
As far as disclosing information that is not 100% directly asked, that is going to be up to your own personal integrity. Sometimes people have to follow the letter of the law, even when the spirit of the law should apply. I believe as much in full-disclosure and integrity as much as I do in the right to not self-incriminate, so those can sometimes be opposed, and even if someone sympathizes with you and wants to let you off, they may be forced otherwise. So justice is not served.
If you've learned from your mistake then that is the best outcome from the situation, wouldn't open my mouth on it ever again. You are already being punished enough by being outlawed by one entire country. If someone specifically asks then that is a different story.