CAIN-42 PBFT quorum-certificate evidence: asymmetric-partition-2026-09-27
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What: Every quorum certificate held by each replica after three one-way partitions (deaf replica, one-way link, mute replica).
Classification: MEASURED on the live 4-server cluster cain-mr-02 during asymmetric (one-way) partition tests
Generated: 2026-09-27T03:27:01Z
Source commitment: git 521f84c0456bf118645722073f09df140167b16b (engine 33.4-production-hardened); source is not published.

Verify in about 30 seconds (Python 3.8+, `pip install cryptography`, no CAIN code):

  BASE=https://cainstudio.online/proof/bundle/asymmetric-partition-2026-09-27/      # or https://mcpgate.online/proof/bundle/asymmetric-partition-2026-09-27/
                                                             # or https://clawx.click/evidence/asymmetric-partition-2026-09-27/
  curl -so verify_pbft_qc_bundle.py "$BASE/verify_pbft_qc_bundle.py.txt"
  curl -so PBFT_QC_BUNDLE.json "$BASE/PBFT_QC_BUNDLE.json"
  sha256sum PBFT_QC_BUNDLE.json verify_pbft_qc_bundle.py
    # expect 3618882fe6ed8653886a92daed66009ec5d08e64c46476891f245eb70cdf97e6  PBFT_QC_BUNDLE.json
    # expect ba452ce42528f11f7f5235727a65cae25a34072bc52b4711fd72581615d06009  verify_pbft_qc_bundle.py
  python3 verify_pbft_qc_bundle.py PBFT_QC_BUNDLE.json

Or open $BASE/index.html: your browser runs the same checks (WebCrypto Ed25519).

Read the verifier before trusting it: it is about 300 lines. It tampers with a certificate
in seven ways and requires every tampered copy to fail, so a verifier that accepts
everything would not pass.

Not claimed: flapping or intermittent links; packet loss, delay or duplication (only complete one-way loss); partitions longer than the stated hold; independent operators or providers; third-party review.