Nothing magnificent here, just trying to repeat what I read in a medium article about blockchains. Go, read it at Learn blockchains by building one
I don't know you but I learn code writing code, go write yours!
The proof algorithm is easy, the has of the concatenation of our proof and previous proof should finish in 4 zeroes
hash('previous' + 'proof')[:4] == '0000'
Easy to proof, difficult to calculate!