Its all black with a white chest

What is my pitbull bloodline

You will not know your dogs bloodline without papers. Colour means nothing.

You need to ask the people you got him from. If the only information you have is his coloring then the only answer I can give you is that "He's a black and white Pitt bull."

If you're asking is he a purebred, you need to see his pedigree.

To know his bloodline you will have to review his papers ( I will assume you don't have any or you would not ask)

You can try and trace it by talking to the owners where you got him

No one here can tell you.

That would be like me asking what bloodline my black lab is from and then telling you he's black.