Chain-key SepoliaUSDC (ckSepoliaUSDC), a multi-chain SepoliaUSDC twin on the Internet Computer, is an ICRC-1-compliant token that is backed 1:1 by SepoliaUSDC such that 1 ckSepoliaUSDC can always be redeemed for 1 SepoliaUSDC and vice versa. The ckSepoliaETH minter canister is responsible for both minting ckSepoliaUSDC tokens when users transfer SepoliaUSDC to its control and burning ckSepoliaUSDC when handling SepoliaUSDC retrieval requests. ckSepoliaUSDC transactions are facilitated through a ledger canister, which in conjunction with archive canisters, tracks ckSepoliaUSDC account balances and transaction history between accounts. An index canister provides access to ckSepoliaUSDC transactions associated with individual accounts.