Church as used by Roman Catholics denotes a denomination. The word in your tagline is the ekklesia...the body of believers.
Also, your tagline is incorrect in that Church is not in caps in the Greek nor is it in caps in the vast majority of the major translations.
Even the Douay-Rheims doesn't put church in caps.
BIblical Hebrew and Greek do not have capital and small (majuscule and miniscule) letters. Duh.