The blockchain is a distributed ledger that is completely open to anyone. They have interesting property, once some data get recorded inside a blockchain it gets almost impossible to change it. Understand blockchain as a spreadsheet or any database table which is duplicated across the thousands of systems in a network, and voila that’s what blockchain is.
Artificial Intelligence is the science and engineering of making intelligent machines, intelligent computer programs to be precise. It is related to the similar task of using computers to understand human intelligence, but AI does not have to confine itself to methods that are biologically observable.