To implement a distributed timestamp server on a peer-to-peer basis, we will need to use a proof- of-work system similar to Adam Back's nostr:nprofile1qqsqyredyxhqn0e4ln0mvh0v79rchpr0taeg4vcvt64te4kssx5pc0spz3mhxue69uhkummnw3ezummcw3ezuer9wcq3camnwvaz7tmwdaehgu3dwfjkccte9emkcann9eehqctrv5x6d3yy Hashcash.