what i mean is a thread or something
like if you did a head you go to it and give them the head for example and they write it on your name so that nobody can steal it and when someone purchase it you can change that
i know .. many people makes textures soo you should recruite trusted people
or if thats takes so much you may make it like a data app on fourms that record names and textures
this would take alot of work soo like i said recrute trusted people!