He is an incredible looking cham, no matter what his lineage turns out to be. It's a shame that there's not a cham DNA test like they have for dogs so you'd know for sure.
and unfortunately i don't think there ever can be. many years of late night discussions with some heavy-duty people in the herp world and i have imagined going to Madagascar and sampling populations to try and get baseline data on locales. however, the problems that exists are so numerous:
-the interbreeding (accidental and intentional) that has been going on on the island for millennia
-the variability and ID of found specimens (quick, Pixel was just caught on the northern coast sleeping on a branch. does he go in the mitsio cage or the ambilobe? in his case, it sure may depend on his age or even the time of day that sways the decision)
-the unreliability of many exporters and their data re: found locations, breedings, etc.
dogs for example have had a comparatively very thorough history on their pedigrees and what brought them from where they were 1000 years ago to where they are today with a tremendous amount of documentation, shows, books, photos, etc. so there exists nowhere near the genetic conundrum that exists with panther chams. (and even so, there still are issues in the pedigree world concerning ID).
even going to a more remote and isolated locale like Nosy Be cannot guarantee that an individual's great grandmother wasn't half bred with another locale. it might be diluted down, but it's still not a pure line that you could then use as the genetic standard for that locale.
i wish it could be different. i'm a vet, and i've spoken with exporters/herpetologists/geneticists/even corporations that would love to receive the grants and do the field work necessary for such a database, but no one that i have spoken with has a way to overcome these obstacles (in this day and age), and it seems that such research would be fraught with errors galore to the point where the data would and should be considered invalid.
imo, all we can do is what reputable breeders currently are doing: follow the lines back as far as possible, breed known lines as much as possible if you're striving for purity, and be 100% upfront if you are creating a morph or are unsure; and then let the market decide. that's certainly my goal at least, and is generally the consensus in the room after those late-night beers have gone down!
would love to hear other ideas for and against-----