I haven't had any luck in Canada with getting service records from other places.. There doesn't seem to be a centralized system where all the records go. They hold them individually.
When you buy the vehicle, the dealership can print out what was done to safety and certify the vehicle on-site. But the best way to find other records would be to look through the manuals for receipts or other paperwork, and call the appropriate dealership from there. I know mine came with a book with a bunch of MOPAR stamps for records of regular service intervals, and one of the pages had the old service shop listed.
I have yet to contact them personally, but I think I might eventually just to see what I can attain from them.
2008 Jeep Grand Cherokee CRD
GDE Hot Tune, DPF Delete, Turbo Res. Delete, Exhaust Res. Delete