For a stock to be illegally shorted the stock itself does NOT EXIST.
If it is sold illegally to someones account, that sale cannot be settled because the share DOES NOT EXIST.
If the transaction cannot be settled within the settlement period ENFORCED BY THE LAW, then it must BY LAW be reported on the Failure to Deliver (FTD) list.
Inversely if the stock has settled, then it exists BY DEFINITION.
Look at the LINK to the FTD listing for RCCH, there is your link that would prove a short or lack thereof.
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