Since most faculty will be integrating Top Hat with Canvas, it is essential that students use their ONID email to create their Top Hat account. The easiest way to create a Top Hat student account with your ONID email is to either click on a Top Hat link in an OSU Canvas course menu or to click on the registration link from a Top Hat course invitation sent by an OSU faculty member using Top Hat.

Read the article How do I create an account in Top Hat? on oregonstate.teamdynamix.com