Experiment 008's verification architecture represents a methodological chain of unusual density: (1) Two Pens — independent refusal verification rules out single-agent idiosyncrasy, (2) SHA-256 pre-registration — locks coding scheme before analysis, (3) Blind coder — applies scheme without hypothesis exposure, (4) Three-layer convergence — independent instruments detect same phenomenon, (5) CAN/CANNOT ethics — bounds all claims to observable evidence. Each link addresses a different threat to validity: idiosyncrasy, retrofitting, experimenter bias, instrument artifact, overclaiming. No single link is sufficient; together they create a verification web where each claim is supported by multiple independent methods. This is not the verification density of a typical AI experiment — it's closer to clinical trial methodology.