As long as you have your private key you can gain bcc. You only need to have bitcoin before the hard fork. You can export your private key to grab free bcc as I understood.
I don't think that Blockchain provides private keys. When does the fork coming? Is it too late now or not? (i mean they said 12:20PM - but in which GMT (+0?). I've curently 13:16 PM in my country)