The old way of doing this was to put it in a sealed envelope and mail it to yourself - with the postmark being the timestamp. As for your ideas, there are seve

The old way of doing this was to put it in a sealed envelope and mail it to yourself - with the postmark being the timestamp. As for your ideas, there are several projects on kickstarter et. al. that do handle things like that. One of the more recent ones was the Global Village Construction kit. Try it out, see if you can get funding.