Your best bet would be to hire an abstract/title company to help you out. It is not that expensive and will save you a lot of time and effort. In my opinion it would be well worth the expense. If you need help locating a title company you can Google it and/or contact me and I can help you. Either way, good luck!
Mitchell S. Feldman
Associate Broker/ Director of Sales/ e-Pro Realtor
Fillmore Real Estate
Office: (718) 252-2000/ Cell: (917) 805-0783
Try ACRIS first:
If that doesn't help you, you're going to have to go to The Brooklyn City Regiter Office:
Brooklyn City Register Office
210 Joralemon Street, 6th Floor
Brooklyn, NY 11201
Mon - Fri: 9:00 AM to 4:30 PM
Good luck, let me know how everything turns out.
Keller Williams Real Estate
9120 4th Avenue Brooklyn, NY 11209
Direct: (212) 300-3919
Office: (718) 954 8400