diff --git a/src/routes/governance/proposals/tx-hash/cert-index/votes.ts b/src/routes/governance/proposals/tx-hash/cert-index/votes.ts
index a228f29c..8c71ee17 100644
--- a/src/routes/governance/proposals/tx-hash/cert-index/votes.ts
+++ b/src/routes/governance/proposals/tx-hash/cert-index/votes.ts
@@ -4,7 +4,7 @@ import * as ResponseTypes from '../../../../../types/responses/governance.js';
 import { getDbSync, gracefulRelease } from '../../../../../utils/database.js';
 import { SQLQuery } from '../../../../../sql/index.js';
 import { getSchemaForEndpoint } from '@blockfrost/openapi';
-import { dbSyncDRepToCIP129 } from '../../../../../utils/governance.js';
+import { dbSyncDRepToCIP129, getCommitteeCredentialId } from '../../../../../utils/governance.js';
 import { isUnpaged } from '../../../../../utils/routes.js';
 
 export const proposalVotesHandler = async (
@@ -38,8 +38,15 @@ export const proposalVotesHandler = async (
     gracefulRelease(clientDbSync);
 
     for (const row of rows) {
+      if (row.voter_role === 'constitutional_committee') {
+        // db-sync stores the raw hot credential hash which does not distinguish
+        // key hashes from script hashes; encode it as a CIP-129 cc_hot id
+        row.voter = getCommitteeCredentialId('hot', row.voter, row.cc_voter_has_script ?? false);
+        continue;
+      }
+
       if (!row.voter.startsWith('drep')) {
-        // Keep non-DRep voter unmodified
+        // Keep SPO voter unmodified
         continue;
       }
 
diff --git a/src/sql/governance/proposals_proposal_votes.sql b/src/sql/governance/proposals_proposal_votes.sql
index 492b58ea..ac18efc6 100644
--- a/src/sql/governance/proposals_proposal_votes.sql
+++ b/src/sql/governance/proposals_proposal_votes.sql
@@ -11,6 +11,7 @@ SELECT encode(vp_tx.hash, 'hex') AS "tx_hash",
     COALESCE(encode(ch.raw, 'hex'), dh.view, ph.view)
   ) AS "voter",
   dh.has_script AS "voter_has_script",
+  ch.has_script AS "cc_voter_has_script",
   LOWER(vote::TEXT) AS "vote" -- Yes, No, Abstain -> yes,no,abstain
 FROM gov_action_proposal gap
   JOIN tx gap_tx ON (gap_tx.id = gap.tx_id)
diff --git a/src/sql/governance/unpaged/proposals_proposal_votes.sql b/src/sql/governance/unpaged/proposals_proposal_votes.sql
index 270ede47..155741c4 100644
--- a/src/sql/governance/unpaged/proposals_proposal_votes.sql
+++ b/src/sql/governance/unpaged/proposals_proposal_votes.sql
@@ -11,6 +11,7 @@ SELECT encode(vp_tx.hash, 'hex') AS "tx_hash",
     COALESCE(encode(ch.raw, 'hex'), dh.view, ph.view)
   ) AS "voter",
   dh.has_script AS "voter_has_script",
+  ch.has_script AS "cc_voter_has_script",
   LOWER(vote::TEXT) AS "vote" -- Yes, No, Abstain -> yes,no,abstain
 FROM gov_action_proposal gap
   JOIN tx gap_tx ON (gap_tx.id = gap.tx_id)
diff --git a/src/types/queries/governance.ts b/src/types/queries/governance.ts
index 3eff92ab..13ff8535 100644
--- a/src/types/queries/governance.ts
+++ b/src/types/queries/governance.ts
@@ -180,6 +180,7 @@ export interface ProposalsProposalVotes {
   voter_role: 'constitutional_committee' | 'drep' | 'spo';
   voter: string;
   voter_has_script: boolean;
+  cc_voter_has_script: boolean | null;
   vote: 'yes' | 'no' | 'abstain';
 }