No, the Big Bang theory does not provide evidence or proof of what happens after we die. The Big Bang theory is a scientific explanation for the origin of the universe, stating that the universe began as a hot and dense state approximately 13.8 billion years ago and has been expanding ever since. It describes the early stages of the universe's development, not the afterlife or what happens to individuals after death.
Matters regarding life after death, the existence of the soul, or any form of consciousness beyond death fall into the realm of philosophy, religion, and personal beliefs. While various religious and spiritual traditions offer their own perspectives on what happens after death, these ideas are not scientifically proven or supported by the Big Bang theory or any other scientific theory. They are matters of faith, spirituality, and individual interpretation.