Depending on the source DNA seems to have a half life of 500-1500 years. This source calculates with slightly over 500 years. Permafrost samples may be more on the upper end of the scale but the message would be similar:

A study of DNA extracted from the leg bones of extinct moa birds in New Zealand found that the half-life of DNA is 521 years. So every 1,000 years, 75 per cent of the genetic information is lost. After 6.8 million years, every single base pair is gone.

https://www.sciencefocus.com/the-human-body/how-long-does-dna-last

If you say it like that, I’ll happily abandon science to go velocitaptor jousting with you!

Even under the best preservation conditions, there is an upper boundary of 0.4–1.5 million years for a sample to contain sufficient DNA for sequencing technologies.

https://en.wikipedia.org/wiki/Ancient_DNA