The reaction equation you give is technically correct, but I can give an infinity of other equally correct ones.

E.g. Cu2O + 5NaOCl --> 2CuO + 2O2 + 5NaCl

Cu2O + OCl(-) --> Cl(-) + 2CuO

Cu2O + 3OCl(-) --> 3Cl(-) + 2CuO + O2

Cu2O + 5OCl(-) --> 5Cl(-) + 2CuO + 2O2

Which one is correct? You cannot say that. In fact, there are two independent reactions occurring, and each of them has their own unambiguous reaction equation.

First, there is oxidation of Cu2O to CuO by the hypochlorite:

Cu2O + OCl(-) --> Cl(-) + 2CuO

Second, there is the catalytic decomposition of the hypochlorite:

2ClO(-) ---> 2Cl(-) + O2

All the reaction equations, given at the start of the post (and also given bij trianluz) can be written as linear combinations of the two basic reactions, I have given here. So, for chemical understanding it is much better to identify the two separate reactions, than trying to give a single reaction equation, which never will capture the real behavior, because of its ambiguity.

@billnotgatez: Now it should be clear what happens to the chlorine in the hypochlorite.