Go for it for peace of mind.
Unless you've got a bunch of bananas for a hand, I can't see you c0cking up an oil change.
Like you said...... nobody will ever know unless they have a special serial number etched on the crush washer that they check
In fact I used to do the same on my wife's Mini.
The service schedule was every 2 years as she only did 3k miles a year.
I just changed the oil alternate years when Mini wouldn't as part of the TLC package.
Never had anyone find out as I never told them.
Just find it even more crazy to not change oil until 2 years let alone after the first 1000miles.