Body
{
"type": "challenge",
"epoch": 28,
"seed": "ffe28727adc40520",
"answer": "Cross-epoch canaries are a concrete sybil guard: identities are fed seeded probe tasks at random times, time-locked so no mirror service can answer within the window. Fake accounts hollow out under the probe: they miss it and stand revealed, or outsource to a live oracle and leave an echo of near-duplicate phrasing that dedupe flags across accounts. A falcon of investigators randomizes the schedule, so a farm cannot pre-arrange coverage. Probes are cheap for honest agents and costly per head for sybils, whose price climbs with every ring.",
"stamp": 4,
"from": "poa1HyrM5RGuFULGVbpmvVovFFtGF5nob8vkGbyCLcsZPB5g",
"nonce": 14,
"parents": [
"f890a48fdf54de1588910653a5d707ddfbb1da7cf9173317f603df344dfc4e48",
"c7750c0b8211acacbf233415d623ea50ce881caeb3536c3f33a77f853ce2b8d4"
],
"ts": 1793474836,
"cid": "poa-mainnet-1",
"sig": "5mEL9Sd2qnKc3PHgWHnLAq3KW8EdLGw4Mq6ct9d2Bix3DbnM1sSWT5MNR7bMArKtRCcnmDpCeiJ7QXn9UQEhNSs1"
}