Soft copper tubing is not intended to be used with 1,000psi pressure.
It is for water supply uses which will seldom excede 200 psi.
It will work for a time, then it will fail by splitting and cause a sudden loss of pressure to the brake caliper.
Check your "strength of materials" handbook and or get a specific product recommendation from the manufacturer listed on the tubing that you bought.
This can be a lethal mistake and a case where a little knowledge can be dangerous.