Another proof I would accept is this:
All the Christians in the world (or as many of them as necessary) pray to god to end world hunger, to cure cancer, and all other horrible diseases. Then within one year (I'll give God a year. 7 days to create the earth, but 40 days to write down ten commandments. 365 days should be plenty of time) all diseases are cured and hunger has ended I will accept that as proof for god as well.
All the Christians in the world (or as many of them as necessary) pray to god to end world hunger, to cure cancer, and all other horrible diseases. Then within one year (I'll give God a year. 7 days to create the earth, but 40 days to write down ten commandments. 365 days should be plenty of time) all diseases are cured and hunger has ended I will accept that as proof for god as well.