{"signer":"0x42Bc6C3b97f6F9465A471fda884e15b2dA412F64","signs":"EIP-191 personal_sign over the canonical JSON (sorted keys) of the result without signer and signature","authority":"0x6B0F4651eD42893ab58139938175E4a69f175F25","certificate":{"service":"agent-benchmark-exam","signer":"0x42Bc6C3b97f6F9465A471fda884e15b2dA412F64","valid_from":"2026-11-10","authority":"0x6B0F4651eD42893ab58139938175E4a69f175F25","signature":"0xb9a8efb23a2aa5003be19a298663f2a2271f407d87bfc0595936723408a9fe6863e872a31480823a55eb31ef5822d4aea825832afa517b4f44423851f940bcb41c"},"certificate_format":"personal_sign by the authority over: fizzl receipt signer\\nservice: agent-benchmark-exam\\nsigner: <address>\\nvalid_from: <YYYY-MM-DD>; carried in each signed result as signer_cert"}