They establish continuous occupation by the same bloodlines, I asked what the definion of country is - there's oral history and law going back along with the paintings.
Bear in mind passports are only relatively recent objects.
Also worth pointing out the British tried that "I think you need something more" line with Terra Nullius .. and their own legal system ditched that as rubbish:
remained sovereign for tens of thousands of years.
Whereas, for example, the "United Kingdom" as a country (of four kingdoms) only dates back to 1801, prior to which there was a long history of contested sovereignty claims, there's some interesting paperwork declaring a King of Scotland as a the King of England, etc.
//edit// Some of your links just show that some people lived on that bit of land. I think you need more to claim a country.