In order for a blockchain to be decentralized and immutable one would need to have a large spectrum of participants involved in mining. If a single party is min

In order for a blockchain to be decentralized and immutable one would need to have a large spectrum of participants involved in mining. If a single party is mining then his particular blockchain could be re-written by that single party or any other single party with greater mining power. Therefore we tend to believe that basing a stamping functionality on a broadly accepted token based blockchain (such as bitcoin or ethereum) is the only way to go.