Proving ownership of code with mercurial?

[Peter Arrenbrecht]

> One nice thing about
> Mercurial here is you can publically post just your changeset IDs to
> create a verifiable record of when your not-yet-published work was
> actually created.

Not that I'd need it, but still an interesting idea for being
proactive in situtations where you only disclose work after, for
example, the next instalment of your payment.
-peter