your going to want to use the public data available through a title insurance company. I worked in title and lending for many years. The best company for title is Orange Coast Title. Their website is TitleAdvantage.com , I do not know if they offer an API to access this information yet but I know their CTO and could ask for you.
It should be as simple as a quick property history search then compare the name on title to the person who claims ownership.
Hope this helps!