A common element of any website is to have your own copyright notice in your pages, normally placed within the footer area. Adding your own to the Corporate 3 theme is fairly simple with the new control panel.
Make sure you are logged into your WordPress administrative area. Once you are in your admin, you will go to the APPEARANCE >> THEME SETTINGS and will look for the settings for the copyright information which by default loads:
Simply retype your own or copy and paste an existing one into this field and click SAVE.