Thanks for the comments. Indeed we want to "do it".
"Poor Man's Patent" is just a way to describe the functionality that we need in a simple way. Actually, this application would reside behind the National Society of Professional Engineers membership curtain. Instead of "inventions", they would archive their "stamped" works upon an appropriate ontology on a secure server and the hash of those documents on a blockchain. Those parts would come later, we just need to prove one step at a time. No budget now, that's why I need off-the-shelf. If demonstrable, they would fund, etc.
Can anyone help mash something together?