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.
On October 14, 2014, Game of Thrones production units were observed filming in CÃ³rdoba, Spain, at the Roman Bridge of CÃ³rdoba, a famous landmark in the Historic Center of CÃ³rdoba built in the first century BC.