Have a look at https://en.wikipedia.org/wiki/Linked_timestamping https://en.wikipedia.org/wiki/Linked_timestamping This is technology from the 90s. The innovat

Have a look at https://en.wikipedia.org/wiki/Linked_timestamping https://en.wikipedia.org/wiki/Linked_timestamping This is technology from the 90s. The innovation of blockchain is the no-trust agreement protocol.