I guess there is little that is totally new. Look at this…
The split tally was a technique which became common in medieval Europe, which was constantly short of money (coins) and predominantly illiterate, in order to record bilateral exchange and debts. A stick (squared hazelwood sticks were most common) was marked with a system of notches and then split lengthwise. This way the two halves both record the same notches and each party to the transaction received one half of the marked stick as proof. Later this technique was refined in various ways
Source: Tally stick – Wikipedia
And do read the rest of the piece on Wikipedia.
Then along came the Blockchain which addresses and solves similar problems. So it seems entirely appropriate that a Blockchain business should call themselves Tallysticks.