diff --git a/contracts/OMN-12403.yaml b/contracts/OMN-12403.yaml
new file mode 100644
index 00000000000..dbb479a3d4e
--- /dev/null
+++ b/contracts/OMN-12403.yaml
@@ -0,0 +1,38 @@
+---
+schema_version: "1.0.0"
+ticket_id: "OMN-12403"
+title: "Migrate node_dod_verify _build_receipt() to ModelDodReceipt"
+summary: >
+  node_dod_verify/__main__.py::_build_receipt() emitted a legacy receipt dict with timestamp, git_sha,
+  and result keys that the DoD completion guard rejects. This migrates _build_receipt() to emit ModelDodReceipt
+  (OMN-9792) matching the reference implementation in omniclaude dod_evidence_runner.write_evidence_receipt().
+is_seam_ticket: false
+interface_change: false
+interfaces_touched: []
+emergency_bypass:
+  enabled: false
+  justification: ""
+  follow_up_ticket_id: ""
+dod_evidence:
+  - id: "dod-omnimarket-pr-974"
+    description: "omnimarket PR #974 migrates _build_receipt() to ModelDodReceipt and updates tests."
+    source: "manual"
+    checks:
+      - check_type: "command"
+        check_value: "grep -q '^status: PASS$' \"$CONTRACT_REPO_DIR/drift/dod_receipts/OMN-12403/dod-omnimarket-pr-974/command.yaml\"
+          && grep -q '^pr_number: 974$' \"$CONTRACT_REPO_DIR/drift/dod_receipts/OMN-12403/dod-omnimarket-pr-974/command.yaml\""
+  - id: "dod-deploy-assessment"
+    description: >
+      Schema-only change to receipt output: no Docker container, runtime process, or Kafka topic is modified.
+      The fix changes the JSON keys written to dod_report.json on disk. No service restart is required.
+    source: "manual"
+    checks:
+      - check_type: "command"
+        check_value: "grep -q '^status: PASS$' \"$CONTRACT_REPO_DIR/drift/dod_receipts/OMN-12403/dod-deploy-assessment/command.yaml\""
+  - id: "dod-occ-pr-1823"
+    description: "onex_change_control PR #1823 carries the OMN-12403 central contract and receipts."
+    source: "manual"
+    checks:
+      - check_type: "command"
+        check_value: "grep -q '^status: PASS$' \"$CONTRACT_REPO_DIR/drift/dod_receipts/OMN-12403/dod-occ-pr-1823/command.yaml\"
+          && grep -q '^pr_number: 1823$' \"$CONTRACT_REPO_DIR/drift/dod_receipts/OMN-12403/dod-occ-pr-1823/command.yaml\""
diff --git a/drift/dod_receipts/OMN-12403/dod-deploy-assessment/command.yaml b/drift/dod_receipts/OMN-12403/dod-deploy-assessment/command.yaml
new file mode 100644
index 00000000000..215b220b3ea
--- /dev/null
+++ b/drift/dod_receipts/OMN-12403/dod-deploy-assessment/command.yaml
@@ -0,0 +1,21 @@
+---
+schema_version: "1.0.0"
+ticket_id: "OMN-12403"
+evidence_item_id: "dod-deploy-assessment"
+check_type: "command"
+check_value: "python3 -c \"print('schema-only receipt writer change; no runtime deploy required')\""
+status: PASS
+run_timestamp: "2026-05-28T21:55:07Z"
+commit_sha: "01c1eafd3a05882979a8fb6f5ccac71cbd20c7f7"
+runner: "codex"
+contract_sha256: "sha256:749850eade7b19b9bdfadd887e101f3b96ee0a1d585ef17ec059a9fb346b216a"
+verifier: "manual-merge-sweep"
+probe_command: "python3 -c \"print('schema-only receipt writer change; no runtime deploy required')\""
+probe_stdout: |
+  schema-only receipt writer change; no runtime deploy required
+actual_output: "PASS: OMN-12403 only changes the local DoD receipt JSON shape emitted by node_dod_verify;
+  no container, runtime process, Kafka topic, or dashboard deployment is required."
+exit_code: 0
+pr_number: 974
+branch: "jonah/omn-12403-dod-receipt-modeldodreceipt"
+working_dir: "/Users/jonah/Code/omni_home/omni_worktrees/OMN-12403/omnimarket"
diff --git a/drift/dod_receipts/OMN-12403/dod-occ-pr-1823/command.yaml b/drift/dod_receipts/OMN-12403/dod-occ-pr-1823/command.yaml
new file mode 100644
index 00000000000..ca410df38ca
--- /dev/null
+++ b/drift/dod_receipts/OMN-12403/dod-occ-pr-1823/command.yaml
@@ -0,0 +1,22 @@
+---
+schema_version: "1.0.0"
+ticket_id: "OMN-12403"
+evidence_item_id: "dod-occ-pr-1823"
+check_type: "command"
+check_value: "gh pr view 1823 --repo OmniNode-ai/onex_change_control --json number,url,headRefOid,headRefName,title,state,baseRefName
+  --jq ."
+status: PASS
+run_timestamp: "2026-05-28T21:55:07Z"
+commit_sha: "fc1cf4fbe105f1227aa1a587b40b3a37d8950780"
+runner: "codex"
+contract_sha256: "sha256:749850eade7b19b9bdfadd887e101f3b96ee0a1d585ef17ec059a9fb346b216a"
+verifier: "manual-merge-sweep"
+probe_command: "gh pr view 1823 --repo OmniNode-ai/onex_change_control --json number,url,headRefOid,headRefName,title,state,baseRefName
+  --jq ."
+probe_stdout: |
+  {"baseRefName":"dev","headRefName":"jonah/omn-12403-occ-contract-clean","headRefOid":"4e89780065d1cbe80702903f16ec9780d40cff21","number":1823,"state":"OPEN","title":"chore(OMN-12403): add OCC contract for node_dod_verify receipt migration","url":"https://github.com/OmniNode-ai/onex_change_control/pull/1823"}
+actual_output: "PASS: onex_change_control PR #1823 carries the OMN-12403 central contract and receipts."
+exit_code: 0
+pr_number: 1823
+branch: "jonah/omn-12403-occ-contract-clean"
+working_dir: "/Users/jonah/Code/omni_home/omni_worktrees/OMN-12403/onex_change_control"
diff --git a/drift/dod_receipts/OMN-12403/dod-omnimarket-pr-974/command.yaml b/drift/dod_receipts/OMN-12403/dod-omnimarket-pr-974/command.yaml
new file mode 100644
index 00000000000..368270dbeaa
--- /dev/null
+++ b/drift/dod_receipts/OMN-12403/dod-omnimarket-pr-974/command.yaml
@@ -0,0 +1,22 @@
+---
+schema_version: "1.0.0"
+ticket_id: "OMN-12403"
+evidence_item_id: "dod-omnimarket-pr-974"
+check_type: "command"
+check_value: "gh pr view 974 --repo OmniNode-ai/omnimarket --json number,url,headRefOid,headRefName,title,state,baseRefName
+  --jq ."
+status: PASS
+run_timestamp: "2026-05-28T21:55:07Z"
+commit_sha: "01c1eafd3a05882979a8fb6f5ccac71cbd20c7f7"
+runner: "codex"
+contract_sha256: "sha256:749850eade7b19b9bdfadd887e101f3b96ee0a1d585ef17ec059a9fb346b216a"
+verifier: "manual-merge-sweep"
+probe_command: "gh pr view 974 --repo OmniNode-ai/omnimarket --json number,url,headRefOid,headRefName,title,state,baseRefName
+  --jq ."
+probe_stdout: |
+  {"baseRefName":"dev","headRefName":"jonah/omn-12403-dod-receipt-modeldodreceipt","headRefOid":"01c1eafd3a05882979a8fb6f5ccac71cbd20c7f7","number":974,"state":"MERGED","title":"fix(OMN-12403): migrate node_dod_verify _build_receipt() to ModelDodReceipt","url":"https://github.com/OmniNode-ai/omnimarket/pull/974"}
+actual_output: "PASS: omnimarket PR #974 carries the OMN-12403 ModelDodReceipt migration at head 01c1eafd3a05882979a8fb6f5ccac71cbd20c7f7."
+exit_code: 0
+pr_number: 974
+branch: "jonah/omn-12403-dod-receipt-modeldodreceipt"
+working_dir: "/Users/jonah/Code/omni_home/omni_worktrees/OMN-12403/omnimarket"