Who was the first owner and pre-owners?

[TV-collector]

Hi, maybe you know, I`m from Germany.
I bought me in 1991 a 1950 Cadillac convertible from Dayton/OH.

The car was partly restored, came with the title and adress of the
pre-owner.
My seller told me, that my car came originally from California, just
because of a rare exhaust-circle system from crankcase to intake.

A 1950 Cadillac convertible was never an everyones car, so for that
I really like to know the names/adresses of the pre-owners.

Yesterday in the german television it was told, that there is a way
by paying about 25 bucks to find out the pre-owners of cars from
the US.

Any advice?
Thanks in advance!

TV-Collector