Too easy to dupe. Boxes can be resealed.
You could hold any box for a period of time and then have anything you wanted come out of it.

Use a regular copyright office for safest protection.

I wonder about the digital encryption copyright offered thru Pasher's motogator site.
They claim it is approved by US Copyright office (approved for what?) and it is only $50 one time fee to copyright as many songs as you want in your lifetime.
They simply encrypt an mp3 with a date and ownership code and send it back to you.

WHOOPS! Seems like thay have disappeared! Guess it wasn't such a great idea.
They did reregister the domain name recently though ... maybe they are changing servers. I'll keep an eye on it.

I do not work here, but the benefits are still awesome
Make your sound your own!