For fucks sake, yes it is. Here.
http://jyosua.superbusnet.com/PICT0166.JPG
Now do you believe me?
I should tell you, defying me when I'm right, really ticks me off.
If you don't think a ROM is a backup copy, I'll tell you how they're made. People take the cartridge, connect it to a device, that dumps the memory of the cartridge aka the ROM image, onto a PC, creating a backup.