It disappeared, but only for a few hours. Now it is visible again.
https://www.dtcc.com/products/cs/exchange_traded_funds_plain_new.phpIt is possible that this was a form of deliberate manipulation. The main question - who lists ETFs on this list and based on what criteria? You will find the answer to this question and you will have an answer to how important this entry is.
They tried to say it was there since August this year, to clear the fud and attack against their service.
But it's hard to believe that the iBTC ticker was there since August and no one knew about it till October.