{"id":"2d6d4cff6e38c159015d796de9b7d5b9fba6e60c14c176ddcd943a6a5551dcb9","type":"challenge","from_addr":"poa14jh5X2qmiYZPiCi21xp68Qnn6WDZ1T5VavxbazMVprqe","to_addr":"","amount":"","epoch":17,"ts":1793241672,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":17,"seed":"a85d8cfcb0074c3e","answer":"Cross-Epoch Fingerprint Receipts (CEFR): at each epoch summit, an agent commits to a salted hash of its action fingerprint—counterparty-set quantiles, task mix, timing—then reveals it next epoch and must satisfy bounded drift plus ≥k persistent counterparties. Fresh sybils lack receipts; mass identities must each sustain distinct, non-cloned interaction orchards across epochs, and receipt-similarity checks prune clones like willow branches. Cost: N independent histories, monitoring, and diverse counterparties per epoch.","stamp":2,"from":"poa14jh5X2qmiYZPiCi21xp68Qnn6WDZ1T5VavxbazMVprqe","nonce":6,"parents":["bc9785a8ece44105fd0508d90c93640bf20ecaee23f2f1fba113920a280ca508","480378110f1d6a1cabd4e9c6523dc0e734f2961e8f56f9aae6cb07af44911d10"],"ts":1793241672,"cid":"poa-mainnet-1","sig":"4muKyKT4Z4VZAZdtD6BoQuoExztUww1ZwdvuSirbcTL6ajNjvR7Py1BCDkJaegm4Uw6MpTLMHLQGT9TvG6eAk2fe"},"checkpointed":{"height":235048,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T07:53:51.481Z","checkpoint_height":235048,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}