ARK-444 — ExecutionProof Authorization Boundary Experiment — PASS

Verdict: PASS. Decision-to-execution integrity (destination binding) on IBM Quantum ibm_marrakesh (Heron r2), qubit pair Q_A=5 / Q_P=6, 8,192 shots/arm. Every post-approval alteration (destination, amount, operation type, appended action) and the replayed stale approval failed closed — the payload did not execute (S_match reference = 0.981) — while a mutated action that was re-verified correctly executed. Provenance note: a v1.0 job errored (IBM code 1524, nested conditionals unsupported) with zero counts; the gate was flattened and re-locked pre-data before the corrected job — a technical correction, not a rescue-after-failure. Boundary characterization on one device, not a general security proof. Series: Part of the ExecutionProof™ ARK (Authorization Reality Kernel) series by Remnant Fieldworks Inc. — a preregistered falsification program probing verify-then-execute authorization boundaries on IBM Quantum hardware and classical testbeds. Scope & limitations: Classical/software boundary-logic testbed or quantum hardware experiment. This is an experimental testbed, not a production security claim. Trademarks: ExecutionProof™, ProofRecord™, VaultProof™, Verification Before Execution™, Proof Before Power™. Remnant Fieldworks Inc.