If they are smallish white spots, then yes, I'd assume they're ich.
Melafix is all natural and is only 1% tea tree oil - so it is very mild stuff. It can imo and ime be combined with coppersafe. In fact, it can be helpful in warding off any secondary infections in the wounds left by the ich parasite.
I will caution you, however, to follow the dosing very carefully (on the Coppersafe, that is) and to make sure that you dont' have any fish that are particularly sensitive to copper, like inverts or scaleless fish