2 sentences for 证 (zhèng — prove)

1. 证据确凿，足以证其有罪。

   zhèng​jù què​záo, zú​yǐ zhèng qí yǒu​zuì.

   The evidence is conclusive and enough to prove his guilt.

   Source: Dong Chinese Dictionary

2. 为了自证清白，他决定将真相布之于众。

   wèi​le zì zhèng qīng​bái, tā jué​dìng jiāng zhēn​xiàng bù zhī yú zhòng.

   To prove his innocence, he decided to make the truth public.

   Source: Dong Chinese Dictionary