Yes, I meant for multiple digits. Basically the work will be give me starting index from which, next N digits are = "45334138023580". Finding the first digit c

Yes, I meant for multiple digits. Basically the work will be give me starting index from which, next N digits are = "45334138023580". Finding the first digit can take ages while verification is O(1)ish. Imagine that to provide storage systems similar to IPFS, but the blockchain network only stores the metadata and no data! https://github.com/philipl/pifs https://github.com/philipl/pifs