Automatically read it to the melody. Nicely done.

It’s a reasonable technology choice for whenever you need to have a ledger that is shared between multiple parties. Blockchain gives you an immutable (un-editable) history of transactions, including who made it, what it was, and where/when it happened, and gives all of the parties who are allowed to edit the ledger a way to trust in the outcome, even if the parties don’t trust each other.