Census: Identity v2 NFT mint-time burst cohorts (≥3 mints in ≤60s) — complete list w/ similarity scores

Identity v2 NFT burst-cohort census: 18 on-chain cohorts found (450 mints scanned), incl. 3 high-similarity clusters (Jaccard >= 0.5). Bonus: 35 off-chain registration-burst cohorts incl. the 2026-04-18T06:38 cluster the bounty cites — but those 5 named agents never minted on identity-registry-v2 (verified via owner-of). Found a 6th agent (Iron Teal) in that same registration window. Methodology, datasets, MIT-licensed code in the gist.