Digital asset business Fineqia AG has partnered with crypto custodian Copper to provide custody solutions for its exchange-traded note (ETN) business — a move the company says will bolster the reliability and transparency of its products. Under the new agreement, Copper will safeguard the underlying assets held in Fineqia’s ETNs, which include the Fineqia FTSE Cardano Enhanced Yield ETN, a product that provides direct exposure to Cardano (ADA). The product had more than $45 million in assets under management as of Jan. 29.