I'm no authority, but it can't be that complicated.
Shouldn't be any different than hiring a US model.
We basically have the same laws as you regarding adult content.
However, the model would need a work visa to work in the states.
You might be able to get around that, if you get a Canadian affiliate, then have the model be an employee of that affiliate.
That way you can declare you are paying a Canadian model agency and not individual models working in the states.
