Digital asset company Fineqia AG has partnered with cryptocurrency custodian Copper to provide custody solutions for its exchange-traded notes (ETN) business, a move the company said will improve the reliability and transparency of its products. Under the new agreement, Copper will protect the underlying assets held by Fineqia's ETN, including Fineqia FTSE Cardano Enhanced Yield ETN, which provides direct exposure to Cardano. As of January 29, the product managed more than $45 million in assets. About 10 months after FineqiaAG was initially approved, CardanoETN began trading on the Vienna Stock Exchange.