However, If I understand you correctly you want to know who handled the listing, sale and closing of your home. I would suggest that you go to your Country Register of Deeds, with the address and legal description of the property and/or tax id number. What you want to obtain is a copy of the Deed that was filed.
When you obtain the Deed on the bottom of the deed you should find "Drafted by" and "Return to" this may provide you with some information on who handled the closing. If it does not, I would suggest contacting the purchaser for this information. (The purchaser will be listed on the deed).