We identify the true Church by going back to Jesus. We know that Jesus founded a Church. Now the key is to keep your finger on that thing that Jesus founded, and move forward through history, century by century, until you reach the present day. Don't go quickly. Read the writings of the fathers of the first century, then the second century, and then third century, and then the fourth century, and then the fifth century. Now, whenever there is a schism, you have to determine which is the split off (at least in some respect), and which is the continuation of the Church that Christ founded. How did the fathers determine which is the continuation of the Church Christ founded, and which is the schism from that Church? Notice the roles of the Ecumenical Councils. Notice also the role of the Pope in the authority of the Ecumenical Councils. (I'm not trying to be patronizing in this paragraph -- I'm simply laying out how I think the true Church is to be found. I'd be interested in how you agree/disagree with that general methodology, and where in history our 'fingers' part ways, so to speak, and at that very point where our fingers part ways, why your finger goes away from mine.)
A question for Bryan Cross: How do you "go back to Jesus"? Where is that "Church that Christ founded" to be found?