Not quite. The problem with a Canadian SIN number is that there might be a US SSN number that is the same. The US & Canada don't coridinate the issuing of the numbers to avoid that. So the number won't tag you as a Canadian, but if might tag you as someone else.no because when they look it up, it most definitely will peg you as a Canuck
I found this out from someone at the Social Security Administration when my wife got her SSN number (as we had inquired if they could just issue one that was the same as her SIN number).