What's a CCM? I don't think the chick facing away is an Australorp because that chick is barred (or cuckoo) & I have never heard of barred Australorps.
Can't properly see the colour of the other chick.
What color were the eggs? Did you have some dark brown eggs? Cuckoo marans eggs should be a dark brown, while the BA eggs would be a light brown.
The barred one looks like it could be a cuckoo maran - it's definitely not a BA. Does the other chick have a white headspot also? Does it have any yellow? It has BA markings, but my BA chicks are black & yellow, not black & white (but.... maybe some are black/white - no yellow?).