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Evidence & Verification

CB’s evidence model is WAL-first.

WAL sources

  • routing.jsonl: routing decision per request.
  • settlement.jsonl: settlement receipt per request/settlement.
  • seal.jsonl: signature record when sealing is enabled.
  • repro.jsonl: reproducibility stamp derived from routing + settlement + seal.
  • archive.jsonl: archival worker status events (optional).
  • stream_gate.jsonl: streaming gate events (optional, when enabled).

All WALs may exist at:

  • runtime_root/logs/*.jsonl
  • runtime_root/tenants/<tenant>/logs/*.jsonl

Verification posture

  • Evidence verification should be possible from local artifacts.
  • External attestation is explicitly treated as a separate milestone.