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It's open for trading only on Bittrex. As soon as the network will be stable, they promised to opened deposits and withdrawals.

If you had your BTC on Bittrex they announced they were going to support both chains and will give you your BCC (BCH) the problem is that this is not right away as you would´ve if you had them on a wallet
This is what appears on Bittrex at the moment

it was a wiser option to keep it in paper wallet.