I have a problem in my work: I always offer good proposals for my boss, but he ignores them visibly.

The worst is that at the same time, another person mentions the same proposal and my boss says it's wonderful!

Other officials note that, but the only thing they do is laugh at my expense.

But I want to put a stop to it! Enough not to get recognition, to have my ideas copied by these idiotic jealous!

How do I prove that the ideas are mine, and my boss ignores me?