Unfortunately, as the lady observed, "a head is a head is a head". Medical technology hasn't currently advanced to the point where a CATSCAN can make a quick and accurate post-mortem evaluation of a head. We still can't sift through whatever crude or funky, or demented or fine, ideas any non-living head may once have been filled with.
I'm also not aware of any ritual tatooes, or other identifying marks or scars, that would let you clearly distinguish among Taliban, and Turkish, Tunisian, Tajik, or Taoist heads.
So a bounty on heads is just that, a bounty on heads. And $10,000 is a whole lot of incentive to separate them from any set of shoulders they might currently be connected to.