Prototype A
Source-address verification receipt

Generate a one-time challenge. Verify an Ed25519 signature where possible. Store a receipt. Attach Uphold transaction evidence later.

1. Challenge
2. Sign

Human users sign with their own wallet. Agents cannot operate Concordium browser/desktop/mobile wallets; agent-operated Concordium signing currently means DFNS or another custody/API signer. Current verifier accepts Ed25519 public key + signature hex.

3. Verify
Result
Waiting.
Recent public receipts
TimeNetworkSourceStatusAgent