Aarta was writen by Bhagat Ravi das , Dhan Dhan Sri Guru Nanak Dev ji saheb and completed by Dhan Dhan Sri Guru Arjun Dev and Badshah darvesh Sri Guru Gobind Singh ji maharaj . The bells part that u mentioned is not right i was there 2 years ago , They only use nagara in the end . Its done the same way guru gobind singh ji had said , please take a look at this video