Based on the Bitcoin protocol, the blockchain database is shared by all nodes participating in a system. Upon joining the network, each connected computer receives a copy of the blockchain, which has records, and stands as proof of, every transaction ever executed.
Tyrion Lannister's shield during the battle on the Green Fork is a massive slab of heavy ironwood banded with steel. In Game of Thrones - A Telltale Games Series, House Forrester controls most of the wolfswood's ironwoods. Their seat, Ironrath, is located at the edge of the largest ironwood forest in Westeros.
And there are thousands of swords in it, not just a few. This Iron Throne is scary. And not at all a comfortable seat, just as Aegon intended. The various depictions of the throne include: 1  The Art of George R. R. Martin's A Song of Ice and Fire (2005); Title page by Michael Komarck (Jaime Lannister on the Iron Throne).