I guess relatively few people are as paranoid as I am, but given the ease and speed of flashing from CrOS or Linux on the C710 itself, I suggest the following process:
1. Before you flash an image, create a backup (BACKUP.BIN) of the current firmware and generate an md5sum for it.
2. Now, generate an md5sum for the image you're about to flash, let's say NEW_FW.BIN.
3. Flash the image.
4. Even if everything appears to go perfectly, create a backup of the firmware again, i.e. READBACK.BIN and either compare it to NEW_FW.BIN or (I prefer to) generate an md5sum for READBACK.BIN and compare the md5sums of the two.
This will allow you to revert to the state of the firmware before you started (with your BACKUP.BIN) and guarantee that the EEPROM now contains what you intended.