not exactly... if he performed for an audience he may or may not have been a fake.
If he performed without an audience there is only the word of a select few acolytes that he ever even performed at all..

These accounts are gathered from a redacted book which may or may not have been inspired by a true story...???

Cue Hollywood disclaimers..

"This movie may or may not be based on a true story, and characters may or may not be fictitious
depending on how heavily lawyered up they are and ready and prepared to sue our pants off..." 😜