If you bought it from a store they should have it on file connected to your personal info. My bike was just stolen on Friday as well and that is what I did to register it on this site.
My week old bike was stolen from secure locked shed. Unfortunately I learned that not every shop keeps serial numbers on the record the hard way. Now hoping for impossible that police might find the culprit. This time around I'm recording serial number, doing multiple customizations to the bike and just received specialized GPS device to be hidden in the bike itself. And the insurance of course.