Bitcoin and Bitcoin Cash blockchain split What is the safest way to make sure on August 1st that I get the amount of BTC I own in BCC?

For example Coinbase is going to keep all the BCC. So if you have BTC in Coinbase you won't get the equal amount of BCC.

I want to make sure I get the equal amount of Bitcoin Cash as I have of Bitcoin once the blockchain splits.
Ensure you have your private key of the address the BTC was sent to backed up. As long as you have the private key, you will be able to spend those UTXOs on the fork and BTC itself.