Nice work man.
I’m not sure how anyone would be able to say what is and what isn’t an orc. these things have been portrayed in so many different ways already, not to mention the fact that they’re fictional creatures. as far as I’m concerned the only guideline that should be followed when making orcs, is that their form should be kept humanoid, and from I can see it looks like you’ve done that.
That said, I would just like to say that the abs look a little painted on to me (there doesn’t seem to be much depth in the side view). If you could push the cavities in just a bit I think it would look better.
… Ok, 
