Nero Burning ROM 2021 provides a 1:1 block-level copy of an optical evidence disc and get a confirmation that source and target are identical.

1.  Select Forensic CD Copy and start to copy. (Also added for DVD and BD forensic copy) 

2. When finished, click Print certificate. A checksum will be shown in the certificate.

3.  Open Nero Forensic Checksum Verifier from menu "Extras", input the checksum and start to verify. It will confirm that the copy is identical to the source disc.