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.
Monuments in Delhi. Iron Pillar, Delhi. The Iron Pillar was originally established in 402 AD in the front courtyard facing the Vishnu Temple as a 'Vishnudhwaja' which is in honour of Lord Vishnu atop Vishnupada, a small hillock at Udayagiri in Madhya Pradesh by Chandra Gupta II who ruled between 375 CE and 414 CE.