Does Cca mean this cable uses copper-clad aluminium conductors?

No. In these product names, Cca is the CPR reaction-to-fire Euroclass. The conductors are solid annealed copper.

Copper-clad aluminium is commonly abbreviated CCA in cabling discussions, which is precisely why this can be confusing: one small change in context leaves three familiar letters doing two entirely different jobs. Here, Cca is the fire class, not the conductor material.