Regarding 'proof of residence', do not confuse with 'country of residence'. These are two different things. Poor of residence is what they are looking for- your proof of continuously residing (CR) in US on/before June 24, 2015. Your passport is not the primary evidence, passport is the proof of Nationality.

For proof of residence, apartment lease document, utility bills etc on/before JUne24, 2015 should be submitted.