I wouldn't use or I never prefer to use the "blacklist" word.
FYI, whenever you didn't pay your loan facility (credit cards included) CCRIS would capture it. i.e. if missed one payment, CCRIS would show miss one payment, 2 than it would reflect 2 etc.

Just that many banks has the policy/rules of rejecting those which missed 3 or more payments. So technically CCRIS doesn't blacklist you, it's the banks policy that rejected you.

Anyway, like mentioned by cuebiz, don't go to AKPK just yet.
Try to call in the banks and ask for rewrite, i.e. cutting your card and transfer your existing balance into term loan where you'll need to service monthly repayment. Banks usually don't like their customers to enroll with AKPK because there's limited "action" they can do on the customer.

Also, once you've enrolled with CTOS, basically it would also show in your CCRIS report. I.e. banks would still reject you until you're out from AKPK. i.e. settled all your loans. So before that, you still can't get any credit facilities. Thus AKPK is the last resort whereby you seriously have no way to turn to.