Comment by profalseidol

There's this course in pluralsight that talks about two orgs that promote scrum. The other one seems to be giving out the wrong ideas. I think it's this one (copied from wikipedia):

    In 2002, Schwaber with others founded the Scrum 
    Alliance[18] and set up the Certified Scrum accreditation 
    series. Schwaber left the Scrum Alliance in late 2009 and 
    founded Scrum.org which oversees the parallel Professional 
    Scrum accreditation series.[19]

I think it was Scrum Alliance that's giving out ideas like Burndown chart is required in scrum.