Bitcoin layer-2 payment protocol Spark has partnered with Anchorage Digital to allocate a total of $210 million to BTC-collateralized institutional loans. Institutions can borrow USDC while their collateralized assets are held by a custody institution. Spark provides the loan funds, and Anchorage Digital manages the collateral through its Atlas platform, a secure automated network that offers 24-hour margin monitoring, settlement, and tripartite services within a regulatory framework.