If the drive won't boot, there's something wrong with the MBR or it's not there, so that's your "verification". However, the command
bootrec.exe /ScanOs should display the list of active records the MBR. If there are none, then again, it's either missing or corrupt.
Kruug's comment is correct in that if you improperly cloned the drive (for instance, only cloned one partition), then the MBR might not have copied. To successfully clone a bootable drive, you have to do a 1-to-1 clone, or use a tool that allows you to clone the MBR and selected partitions. Personally, I use Macrium Reflect.
As for repairing it, using a Windows boot disk:
On the install Windows splash screen, click "Repair your computer"
After a short hardware scan, in the "System Recovery Options screen", click the bottom option for command prompt:
In the command prompt, enter the following commands (each should follow with an "Operation was successful"):
Source: Tom's Hardware