Hi John you can do this by 3 ways , i am having a software for this and i time to time check back link status for my clients and you can do this in 3 ways first you can purchase a software for backlink checking, second way is you can check back link from any online webmaster tool (http://www.searchenginegenie.com/), 3'rd way is you can check it manually just type (link:www.yoursite.com) in google search it will show you the result.
Thanks.