What is the hearts chain bass

If you mean the order of which they were made, here it is: Kingdom Hearts, Kingdom Hearts 2, Kingdom Hearts Chain of Memories, Kingdom Hearts 358/2 Days

BUT THIS IS THE ORDER THEY ACTUALLY GO IN: Kingdom Hearts, Chain of Memories, 358/2 Days, Kingdom Hearts 2. Also, the other 2 upcoming ones: After Kingdom Hearts 2 will be Birth By Sleep (on psp) and Kingdom Hearts 3 (most likely on ps3)