# C271 final independent review

Reviewed the completed C271 report, checkpoint, and exact verifier against the independent36-pair derivation. No material mathematical or provenance error found.

- The six matches, thirty failures, same-Gear binding rule, and identical center/seasonal residuals are correct.
- Cumulative indices2–7, their five elapsed years, and the generated regular images required at indices0/1 are correctly distinguished.
- Center0 correctly displays1t BC / AD1n. Original BC seasonal ancestry and reflection order remain consistent with C270.
- The radius ratios(4rho+1)/(4rho−1) are correct;25/23 occurs only at rho6 in the held six-row domain.
- Omitted index0’s local0/2 images correctly co-locate with admitted index2 on opposite source roles; those co-locations do not fill source coverage.
- A separate execution passed271 assertions. All six generated output files compare byte-identically with the completed evidence outputs.

No C272 calculation, broader source test, root-file edit, or upload was performed by this review.