Ok, here's what we've got:

edit2: note that it's unclear if that's a O or 0 above; the two fonts are different so there's nothing to compare it against. I think it's most likely the letter O but the transformation below assumed it was a 0.

perhaps that means a transformation?

or perhaps a similar thing with just the digits?

zip codes in nebraska and hawaii?

edit: amusing factoid: if I convert that to GPS, it's in Siberia... I was all excited that it might be pointing at the Tunguska event, but upon closer inspection it's quite a ways off. Siberia a big place.

uhhm.

the fact that string is 51 characters was obviously compelling at first, but it's not in base58 so it's unclear how we'd shift it into a private bitcoin key. I've tried a couple approaches and always end up with some invalid characters, unless I start out by doing some weird transpositions that don't make a lot of sense.

edit3: it's also unclear what the next step is - there's no obvious thing to unzip, so does that mean we're almost done? even if that's the case, I am going to step away from the keys for a while.

edit4: managed to extract this hidden image!


...

ok, not really. zzz.