FWIW even in the US system the courts usually won't order someone off land they are living on or using even if this were the case. At worst they would order compensation be paid - which is what title insurance actually covers.

Many states have a statute of limitations anyway. If you live on the land and pay the property taxes for N years everything else becomes irrelevant. Either the title was transferred to you or you squatted on abandoned land for N years: in both cases it becomes yours.