When you apply the ECA for Immigration Purpose from an evaluation body in Canada, you're provided with two copies of ECA report usually: one is shared with you and the other one is shared directly to IRCC. Check in your online account or MCC customer executive for the same.
Hey,
I'm a physician too and I just sent the digital version of my ECA. The IRCC can check the ECA based on the number we provide, so I believe there's no problem in just sending them this digital version.