Issuing and revoking AI licenses (driver's licenses or others) seems like a very good use case for the block chain. You can predefine rules for removal etc. The

Issuing and revoking AI licenses (driver's licenses or others) seems like a very good use case for the block chain. You can predefine rules for removal etc. There's a bit of literature about automatically executed contracts on the block chain and this use case seems very similar.