1.
Self-proclaimed is used to show that someone has given themselves a particular title or status rather than being given it by other people.
...a self-proclaimed expert...
He is President of his own self-proclaimed republic.
= self-confessed
ADJ : ADJ n
2.
Self-proclaimed is used to show that someone says themselves that they are a type of person which most people would be embarrassed or ashamed to be.
One of the prisoners is a self-proclaimed racist who opened fire on a crowd four years ago.
= self-declared
ADJ : ADJ n