A record that is its own proof.

What you make — a file delivery, an offer for sale — becomes a record whose identity is its own contents. Change a price or a file and the id changes with it.

Pick a tool and start. Nothing is held by PX while you work; you sign in only at the last step, to publish under your name.

Auction, crowdfund, video, music, writing, service and matching arrive in upcoming days.