Sorry, that doesn't seem a practical way to prove work at all (the one you've used here).

Now, with that said, proving both authorship and originality (hey, lots of us have plenty of content stashed away in other places, and it seems like the community has decided to unoffically frown on content re-use) is a good idea. But-- instead of encoding things in the first letter of N, does anyone else have some thoughts on how this could be done effectively, and preferably, automatically?

Upvoted for the idea, certainly not the execution....