It looks like you've studied this a bit. Good work casting doubt, doubt's good, and everyone does have an agenda. BUT, reason for bias does not automatically invalidate one's work - professionals can still gather "just the facts"
And even with just the facts here, we can only get part of the picture from the USCCR report. They were looking for infringements of civil rights, as per the old South problems on the 1960s. There was no "we don't like black people they can't vote" decision or greeting at the polls. But the Commission does claim that "many eligible Florida voters were, in fact, denied their right to vote, with the disenfranchisement disproportionately affecting African Americans." Unless that's a lie, they did look at the whole field somehow and were able to decide which portion was Black.
Yes, some were felons, and many more were listed as such and denied. The anecdotes say for a couple examples:
Lost in the shuffle and on neither her old nor new roll. Ooops.
That had better be untrue.
Unprecedented (at 14:00) features Rev. Thomas Johnson, Pastor, Gainesville “My rights were stripped.” Out-of-state felon, rights restored, who should have been allowed to vote but wasn’t. These people were supposed to get letters telling them to re-apply for civil rights. This has been called "clearly illegal," a violation of the good faith clause. I'm not sure how many people did or didn't get their letters and how many managed to get their rights back prior to the vote.
Prove, the way I take it, is a lofty goal. But for evidence: the company asked to make up a list of felons or deceased persons, wrongly registered, was Database Technologies, a Choice Point company, paid $4 million to make a good list to help Florida out.
From
chapter five:
The Unprecedented Video (15:45-16:17) shows George Bruder, project manager for DBT, sounding unhappy about the election