If such a database exists, it is ILLEGAL, and heads should roll--yes, literally-- for constructing such a monstrosity.
Yes, it's true that BATFEral agents can go to a local gun store, and copy as many Forms 4473 as they can carry. But making a database of them, and then searching it using a citizens' name, is SPECIFICALLY ILLEGAL at the Federal level.
Not that Obama's thugs would obey that law, of course.
And who, pray tell, is going to do the head rolling?
A little story: I was stationed in Germany in 1981 and took with me a snubnose S&W .38. To bring it back again I had to prove that I had bought it before leaving the States.
I wrote to BATF & they replied with a nice letter that stated “our records show that you purchased this revolver SN#XXXXX on October 12, 1973. You may use this letter as proof of prior purchase.”
That was 33 years ago. It’s illegal to place 4473’s in a central file or database? Hmm.....