Visa, Citi, Fiserv, First Data, Capital One, Nasdaq, and Fidelity are strategic investors in two-year-old Chain, which builds blockchain networks for specific applications including a wide variety of use cases in financial services. Blockchains are cryptographic-secured distributed ledger (database) protocols that permit peer-to-peer (no intermediary) instant routing of transactions within networks. Bitcoin and other digital currencies were synonymous with blockchain networks when both were introduced in 2008. Digital currencies do use blockchains. They are also a new asset class, which means ...