You did not buy Mac OS 9, you purchased a limited license.
The license specifically prohibits Mac OS 9 from being used in certain ways....for example on two machines at the same time...and more interesting, it prohibits it from running on nonApple hardware.
There are a few countries in the world where piracy is legal, but it was decided a while back, that on amiga.org that as an american website, american law would be the reference point...anyway it hardly matters its the same in europe....
long story short, to answer your question, its not legal to run mac os on non-apple hardware...90% of the time this isn't a problem, because Linux PPC and MOL run on apple hardware 90% of the time...but for AmigaONE/pegasos, you are left out cold.