What “Verified Contracts” means on Arc
Source verification proves that a published Solidity or Vyper source compiles to exactly the bytecode deployed on chain — the compiler, its version, the optimiser settings and the constructor arguments all have to reproduce the deployed bytes. It is opt-in: a contract earns this label when somebody submits its source, so the vast majority of Arc's contracts are unverified simply because nobody has submitted them.
No addresses carry the Verified Contracts label yet
No contract on Arc has had its source submitted and matched yet. Verification is opt-in, so this is an empty set rather than a failed lookup — the contract list shows every contract that has been deployed.
An address is a 20-byte identifier that can hold a balance and, when it carries code, execute it. Gas on Arc is paid in USDC, so the balance shown for an address is denominated in dollars rather than in a volatile asset.