You can 'look' at your BCH in a block explorer (e.g. https://blockchair.com/bitcoin-cash/blocks).
Just paste in your addresses which had BTC on it at the time the fork/snapshot happened.
What kind of wallet backup do you have?
Just a wallet file? Or private keys in plain/encrypted text?
Do you have a mnemonic seed? (not sure if those already existed back in 1.x versions).
Your BCH are 'sitting on your private keys' which had BTC at the time of the fork.
You can move you BTC's without any risk to your BCH. Actually you should move your BTC before importing your private keys into a BCH wallet - for security reasons.
At least that's how I'm reading it.
the old wallets will be killed since we're setting up newer wallets to get newer coins from our sites, these old wallets just caught btc when it was cheap, now it's so expensive no one uses btc for digital books or services anymore, it's all moving to new coins.
Thanks