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Sorry, still don't understand the question. When you enter with an open work permit you have status in Canada until the expiry of your permit and you can work in any occupation (with few exceptions). What about 'visa stamp' are you asking about?
 
Sorry, still don't understand the question. When you enter with an open work permit you have status in Canada until the expiry of your permit and you can work in any occupation (with few exceptions). What about 'visa stamp' are you asking about?

I think the OP is looking to get an H1B stamped in Canada using a Canadian OWP to enter.
 
So . . . OP is asking if he can enter Canada and get his US HB1 visa stamp in that process? Or is this a tortured description of flagpoling?

Not flagpoing.

You have to visit a consulate outside of the U.S. to get the H1B visa stamp in your passport.
 
Scylla got it correct. I am just worried if they can deny my H1 on the fact that I am on Canadain sowp?