Joe, seriously...you're entirely too paranoid about thievery so maybe you should consider taking up something safe, knitting, perhaps.
If things get copybotted, oh well, it'll happen...and it's not that big a deal in the grand scheme of things. It's a cartoon. It's digital. It has zero intrinsic value. Do you think the creators of those social media icons to your left are having a coronary over all the people who've copied and used them without paying? No. It's just not that big a deal to rational, secure sorts.
Why you harp so much about copybots is a mystery. It doesn't matter in the grand scheme of things. And most of us here seriously doubt you create anything that outstanding that it's forcing you to live on your knees in fear and agony over the possibility somebody will steal it and not pay you for it.