A semantic note -- under canonical definitions, "proof of help" is a bad name for your idea. Proof of work/stake means they're using work, or stake, to secure t

A semantic note -- under canonical definitions, "proof of help" is a bad name for your idea. Proof of work/stake means they're using work, or stake, to secure the blockchain; it's the answer to the question "Which blockchain do we trust?" The chain with the most work in it, or the most stake in it. Here, your "help" is the object you want to have on the blockchain that is trustlessly secure. The analogous object in bitcoin is money.