"I've got" means "I possess", but you don't possess your certificate at the University of Murcia.
You can say "I've got a certificate from the University of Murcia" or "I obtained a certificate at the University of Murcia" (simple past because the act of obtaining the certificate is complete).
I think the main British/American difference with regard to "university" is in contexts like (AE) "John majored in biology in college." BE speakers say, I think, something like "John read biology at university."
Maybe a BE speaker could confirm this.