OffChain Global Istanbul | 165 followers on LinkedIn. Istanbul Chapter is a part of the global networking community for blockchain and crypto enthusiasts started in 2017. | OffChain is a global community to meet and make friends with blockchain and crypto enthusiasts. We welcome a wide range of like-minded people from blockchain developers to crypto VC’s to miners to quant traders to people who just own a little Bitcoin. We welcome everyone who has an interest in blockchain and crypto.