Check MD5 is easy to do in Linux Mint, this help shows you how to do, open the folder where the ISO file is downloaded.
Right-click the ISO file and then select the MD5sum
MD5 digests have been widely used in the software world to give some assurance that a transferred file has arrived intact. For example, file servers often give a pre-computed MD5 (known as Md5sum) checksum for the files, so that a user can compare the checksum of the downloaded file to it. Unix-based operating systems include MD5 sum utilities in their distribution packages, where Windows users use third-party applications.