As Randy said, Copper is acceptable for the Kansas tournaments. Many of the USAW Regional and National events are now requiring Bronze, however, so when you have a choice, I would strongly recommend the Bronze. This will give you more options and flexibility for the future.
I wanted to clarify this for those coaches thinking about getting certified in the future. Of course, at this point, the online Copper is about your only alternative if you want to be able to coach at this year's state qualifying tournaments! Don't forget that you must also have a current USAW coaches membership card.