You could most likely plug your OT power supply into the 110V AC outlet without problems.
For using just a power cable (directly, without the OT power supply) I don’t know for sure, but it looks like the OT mk2 would be compatible with the 12V DC port. I don’t think that’s the case with the OT mk1.
I know it’s not very useful for someone to answer without knowing for sure, but I thought I would point out that the Octatrack mk1 and mk2 don’t have the same power requirements. The mk2 is 12V DC 2A and the mk1 is 6V DC 3A. Hope that’s helpful.