diff --git a/scripts/verify-reconstruction-readiness.mjs b/scripts/verify-reconstruction-readiness.mjs
index 1de268ae8..940a39fdd 100644
--- a/scripts/verify-reconstruction-readiness.mjs
+++ b/scripts/verify-reconstruction-readiness.mjs
@@ -1,7 +1,6 @@
 import assert from "node:assert/strict";
 import { execFile } from "node:child_process";
-import { access, mkdtemp, rm, writeFile } from "node:fs/promises";
-import { tmpdir } from "node:os";
+import { access, writeFile } from "node:fs/promises";
 import { join, resolve } from "node:path";
 import { promisify } from "node:util";
 
@@ -25,8 +24,6 @@ const electronPath = join(fixtureRoot, "electron");
 const environment = {
   ...process.env,
 };
-const temporaryRoot = await mkdtemp(join(tmpdir(), "rea-readiness-"));
-
 await access(nativePath);
 const nativeEvidence = await runCli(["inspect-artifact", nativePath, "--json"]);
 const javascriptCliEvidence = await runCli([
@@ -135,7 +132,6 @@ try {
   );
 } finally {
   await client.close();
-  await rm(temporaryRoot, { recursive: true, force: true });
 }
 
 async function runCli(arguments_) {
diff --git a/src/domain/evidenceBundle.ts b/src/domain/evidenceBundle.ts
index 217b44fee..4deceb0c4 100644
--- a/src/domain/evidenceBundle.ts
+++ b/src/domain/evidenceBundle.ts
@@ -238,7 +238,13 @@ export const parseEvidenceBundle = (input: unknown): EvidenceBundle => {
     const owned = immutableBundles.get(input);
     if (owned !== undefined) return owned;
   }
-  const parsed = evidenceBundleSchema.parse(input);
+  return authenticateParsedEvidenceBundle(evidenceBundleSchema.parse(input));
+};
+
+/** Authenticate evidence and bundle invariants after the bundle shape is parsed. */
+export const authenticateParsedEvidenceBundle = (
+  parsed: EvidenceBundle,
+): EvidenceBundle => {
   const recordIds = parsed.records.map(({ evidence_id: id }) => id);
   if (new Set(recordIds).size !== recordIds.length)
     throw new TypeError("Evidence bundle contains duplicate record IDs");
diff --git a/src/domain/reconstructionReadiness.test.ts b/src/domain/reconstructionReadiness.test.ts
index 93f827c85..df0d5e2a0 100644
--- a/src/domain/reconstructionReadiness.test.ts
+++ b/src/domain/reconstructionReadiness.test.ts
@@ -14,6 +14,45 @@ const input = (
   ...overrides,
 });
 
+describe("readiness bundle authentication", () => {
+  it("authenticates each Evidence record after parsing the readiness contract", () => {
+    const value = input();
+    const record = value.evidence_bundle.records[0];
+    if (record === undefined) throw new TypeError("Missing Evidence record");
+    value.evidence_bundle.records[0] = {
+      ...record,
+      evidence_id: `ev_${"0".repeat(64)}`,
+    };
+
+    expect(() => createReconstructionReadinessReport(value)).toThrow(
+      /Evidence semantic identifier does not match its record/u,
+    );
+  });
+
+  it("rejects a noncanonical bundle manifest after readiness parsing", () => {
+    const value = input();
+    const provider = value.evidence_bundle.providers[0];
+    if (provider === undefined)
+      throw new TypeError("Missing provider manifest");
+    value.evidence_bundle.providers.push(provider);
+
+    expect(() => createReconstructionReadinessReport(value)).toThrow(
+      /Evidence bundle manifests are not canonical/u,
+    );
+  });
+
+  it("rejects duplicate Evidence record IDs after readiness parsing", () => {
+    const value = input();
+    const record = value.evidence_bundle.records[0];
+    if (record === undefined) throw new TypeError("Missing Evidence record");
+    value.evidence_bundle.records.push(record);
+
+    expect(() => createReconstructionReadinessReport(value)).toThrow(
+      /Evidence bundle contains duplicate record IDs/u,
+    );
+  });
+});
+
 describe("reconstruction readiness report", () => {
   it("accepts every caller supplied capability", () => {
     const capability = RECONSTRUCTION_READINESS_EXAMPLE.capabilities[0];
diff --git a/src/domain/reconstructionReadiness.ts b/src/domain/reconstructionReadiness.ts
index f7553b75f..13a51e67c 100644
--- a/src/domain/reconstructionReadiness.ts
+++ b/src/domain/reconstructionReadiness.ts
@@ -1,8 +1,5 @@
-import { createHash } from "node:crypto";
-
-import canonicalize from "canonicalize";
-
-import { parseEvidenceBundle } from "./evidenceBundle.js";
+import { digestCanonicalValue } from "./canonicalDigest.js";
+import { authenticateParsedEvidenceBundle } from "./evidenceBundle.js";
 import { readinessFindingOrder } from "./reconstructionReadinessFindingHelpers.js";
 import {
   READINESS_STAGE_IDS,
@@ -24,7 +21,7 @@ export const createReconstructionReadinessReport = (
   const input = reconstructionReadinessInputSchema.parse(inputValue);
   const sourceDigest = digest(sourceValue(input));
   const evidenceIds = new Set(
-    parseEvidenceBundle(input.evidence_bundle).records.map(
+    authenticateParsedEvidenceBundle(input.evidence_bundle).records.map(
       ({ evidence_id: evidenceId }) => evidenceId,
     ),
   );
@@ -185,8 +182,5 @@ const ratio = (numerator: number, denominator: number): number =>
   denominator === 0 ? 1 : numerator / denominator;
 
 const digest = (value: unknown): string => {
-  const encoded = canonicalize(value);
-  if (encoded === undefined)
-    throw new TypeError("Reconstruction readiness value is not canonical JSON");
-  return createHash("sha256").update(encoded).digest("hex");
+  return digestCanonicalValue(value, "Reconstruction readiness");
 };