How the hell is it official. You see a stamp and a signature on that?
It is not the original but a recently produced official copy. I got the same thing recently when I had to replace the lost original in order to get a passport.
Don’t believe me. Get in touch with the county in which you were born and apply for a duplicate birth certificate. You will have to answer intrusive questions as this is a security document but eventually you will recieve a very similar document.