When I first bought my Westsail 32, I was interested in her history and as she was documented with the USCG I went to their website to find out more. Well it turns out that for $15, you can get all the information that they have about your boat sent to you.
If you try it using my boat name Onapua, this is what you will get.
There are also other sources, for instance the Westsail website says that my boat circumnavigated. I still don't know much about this and Bud Taplin who knows most things about Westsail doesn't know. I would also like to know how the boat got from California to Maryland.
If your boat is not documented with the USCG, it may be possible to look up other registration databases. Different jurisdictions operate differently and it is just a matter of searching and hopefully finding what you you are looking for. In these days with privacy issues, it is almost scary about how much information is available online about you.