Yes the first 10 amendments are "The Bill of Rights" everything else came after and were done to adjust for the times... as you said a Living Document, changing any amendment is by design very hard, changing one of the first ten is near impossible by design...
The Court has the ability to decide as to the interpetation by Laws what some of those amendments actually mean, but to erase one or to change it at it's very core would require a huge effort...
Take Freedom of Speech, the court decides what that really means and what is protected by the Amendment...