Having been a Long Islander myself not too long ago (born & raised), I am a Realtor here in Florida full time for the last 5 years, I can tell you that New York does not have the same policies in terms of Nassau (and Suffolk) County Records Disclosure and public access as other states do. Assuming the home is one you are interested in purchasing, in NY State an Attorney is part of the Real Estate Transaction, so I would suggest you go directly to the attorney you plan on using and ask them to research the property history on your behalf.
Best of luck to you. If you run into any issues and need a Realtor there to assist you, I have a great Network of Long Island Realtors that I work with and I would be happy to refer you to one of the agents.
Charlene C Weston
Tampa Area Realtor
Smith & Associates