In Ontario, when you change the ownership of a vehicle, the DMV researches the vehicle's history. They check for liens and you get a printout of all the PO's. When I purchased my '53, they traced only to the person I bought it from because before that, the truck was registered in the US. When I bought my 69 Chevelle, they went all the way back to the original owner, which was about six owners. The cost is around $25.-