What follows from two things?

A made object carries the cost of its own work, tied to a key, with evidence a stranger can check from the file. How that cost is put in the object is How do you make a digital thing scarce? A public order is a sequence anyone can read and nobody owns. A mark in it is a place in that sequence. What that order is, and what it is not, is How do you prove when the work happened?

Those two are not the bottom of the stack. The object already is a composition: a key, a cost, and a place in a public order, put together so a stranger can check the file. What follows is the same step, taken again.

Place one such object in the order so that it names an earlier one and names where that earlier one sat. The link is not a note in the margin. It is a new object. It has a before and an after, and a stranger can confirm both without asking either maker, because everyone reads the same sequence. Nothing else was added to make that checkable. It follows from a costly object and a shared order.

A new object that can be named can be placed again. This after that, that after the one before. What appears can be named, placed in the same order, and checked by a stranger. Compose it with another and the result is a further object, which can enter the next composition. Each step yields something that was not in either piece alone, and that something is available to the step after.

The order does not get replaced on the way up. A private list of the links would throw away the property that let a stranger check them. The cost does not move either. A chain of ten is ten objects. Why a cost that can be shared is not the cost in question is What kind of cost refuses to divide?

What the further objects are for does not follow. The pattern is the repetition: one object composed with another makes a new object, and that object can enter a further composition. Naming the subjects those compositions might become would be a guess. The pattern is visible. The uses are not.