any ideas wouold be great!

I was born in San Fran. on Feb 16 1969. This was a sealed adoptions so I have very little info. Although hospital records show 1 boy born that day was unnammed (which would be me!). How can I get more info on names of parents or parent. I am searching only to thank them for making a great choice that lead me to 2 very wonderful parents and now my own wonderful family.any help would be great!!