12 year old Coker tires, still ok?

[Tom's36coupe]

So my 36 has had its tires since 2008, Coker radials with white walls. Its been sitting for eight years waiting for paint project to be finished. Now that its almost ready to get on the road for spring got me thinking, the tires are 12 years old even though they only have about 500 miles on them. Hearing stories about old tires after several years going bad. Hate to get rid of them but question how safe they are.