There is a Linux live image for BBB ?

Anyone know if exist a Debian (or another Linux distro) Live image for BBB, bootable from uSD card?

I need a system that can boot in a RAM disk, without modifying any files on the uSD card, because I need the operating system to be verifiable, via SHA sum, for example, and therefore must be immutable.

Debian have scripts to build a live image, but only for i386 and AMD64 architectures.

Thanks in advance,