If you look at your Roth account, there should be a tracking number of some type (TDA has one) for your previous UOIP holding. Holding an ownership position in a business is a valid holding in a Roth, just like shares, mutual funds, gold, artwork, ect. If there is any payout to you from your ownership in UOIP that is contained in your Roth-no tax. That tracking number is proof that it is in there, and any payment from UOIP will go in there.
All information provided is the opinion of this poster from review of information in the public domain.