Just like the PCAOB reviews auditors, FINRA audits along with a PCAOB Broker/Dealers, SEC reviews T/As.
T/As would have this information, corporate resolution to issue the shares, the legal opinion, how and why the shares were issued, how and why the restrictive legend was removed.
The SEC will eventually get around to this particular T/A, I don't think they get reviewed every year however, and I think it is a spot check, not a full audit.
Hopefully, they have your notices on file when they finally get around to DDCC's T/A to make sure it is on the list of items to look for.