Cu0 + 4 HNVO3 CuII[NVO3]2 + 2 NIVO2 + 2 H2O

This is a complexation reaction: Cu[NO3]2 is the formed complex.

This is an oxidation-reduction (redox) reaction:

Cu0 - 2 e- CuII (oxidation)

2 NV + 2 e- 2 NIV (reduction)

Change the oxidation states