The CBC also said it had the document authenticated by Stoneham town clerk Maria Sagarino.
Sainte-Marie denounced the allegations about her heritage in a preemptive statementposted to social mediaThursday.
She did not make these accusations publicly until her 2018 autobiography.
Buffy Sainte-Marie.Credit: Scott Dudelson/Getty Images
Sainte-Marie is not the only public figure to have been accused of faking her Indigenous heritage.
