Maybe, just maybe, it's sensitive info...
You're correct though, that is literally all it would take to prove it (you wouldn't be able to disprove it unless you took a huge sample of all Native Americans, but that's only because of the nature of falsifiability). It would be so easy, yet nobody has gone into any detail. The truth is too big to cover up though, someone will do it eventually.
There is a guy who is on the "Ancient Aliens" show that got a couple of Paracas Skulls dna tested in Canadian labs.
They only tested for mtdna and the results he claimed were U2e1, U2e, H1, H, K, H2a, J1b1 (european haplogroups) with the rest being either normal native american groups or no result.
Normal mtdna haplogroups for Native Americans are A,B,C,D, and X.
Now, I'm well aware that the probability that these results are legitimate is very very low.
Either he is a scam artist trying to cash in on money and sell his tours and books. Or he is an incompetent moron who has contaminated the samples. Or a mix of both.
I was curious when I heard about these tests and checked his videos, and its clear he has not even a basic understanding of genetics. He didn't even understand y-dna vs mtdna and things as basic as this (and of course he was trying to spin his results as being related to aliens somehow).
His lack of any understanding about even basic dna stuff made it clear that if it was a scam then somebody else must have prepared his DNA results for him, since their "curation" reflected an understanding of archeogenetics and historical context way beyond his own. If it was a contamination then it must have been quite coincidental to have it contaminated by mtdna groups specifically located around the black sea area.
Nonetheless, if there is even
1% chance that just
one of his samples legitimately turned up european mtdna, shouldn't there be immediate interest to confirm one way or another? (Paracas culture preceded the Nazca culture and dates 1250BC - 150BC which means there would be deep pre-colombian trans oceanic contact confirmed)
At the worst the public deserves a severe debunking of his claims if they are false.
The guy promoting this thing is interested in the alien aspect and so doesn't quite understand the gravity of having found european mtdna in south america.
I know that Lazaridis was part of the debunking team that did the DNA analysis of the Atacama "Alien".
I would love to see something like that for these paracas skulls also.
Its too frustrating to think that the Paracas skulls could have european mtdna, and that the scientific community is ignoring it because they are the property of some moron who is promoting his ancient aliens theories.