Soulmelds are magical, so their bonuses are magical, so you get magic enhancement bonuses to attack, to damage, or both, when using certain things, as specified in the soulmeld. It is not necessary for the soulmeld to spell out that it is a magical bonus, any more than it is necessary for magic weapon to do so.
Note that overcoming DR/magic officially requires
Any weapon with at least a +1 magical enhancement bonus on attack and damage rolls
, so a bonus to just one of those would be insufficient. In my personal opinion, this is dumb and a magic bonus to either should be sufficient, but RAW is what it is.
As for your totemist's specific items:
Girallon Arms do overcome DR
Every point of essentia you invest in your girallon arms
grants you a +1 enhancement bonus on attack rolls and
damage rolls with your claw attacks.
Brass Mane does overcome DR
Every point of essentia invested in this
soulmeld grants a +1 enhancement bonus on attack rolls and
damage rolls made with the bite attack.
Blood Talons do not overcome DR
(Totem Bind): Every point of essentia invested in the bloodtalons grants
a +1 enhancement bonus on attack rolls made with the
Displacer Mantle does not overcome DR
Every point of essentia invested in the displacer mantle
grants you a +1 enhancement bonus on damage rolls made
with the tentacle attacks.
With thanks to Weaveworker89 for checking the individual soulmelds.