diff --git a/signalvault_verifiable_privacy_preservin/schema.py b/signalvault_verifiable_privacy_preservin/schema.py
index 3bd8dd3..2a6cc77 100644
--- a/signalvault_verifiable_privacy_preservin/schema.py
+++ b/signalvault_verifiable_privacy_preservin/schema.py
@@ -42,9 +42,17 @@ class HedgePlan:
 
 @dataclass
 class AuditLog:
-    entry: str
-    timestamp: int
-    actor: Optional[str] = None
+    # Per-message audit log entries. We keep a list to support multi-entry provenance.
+    entries: List[str] = field(default_factory=list)
+    # Optional signer identity for provenance signing
+    signer: Optional[str] = None
+    # Optional timestamp for when the log entry was created
+    timestamp: Optional[int] = None
+    # Optional contract identifier related to this audit log
+    contract_id: Optional[str] = None
+    # Optional cryptographic chaining fields (for verifiable provenance)
+    parent_hash: Optional[str] = None
+    signature: Optional[str] = None
 
 
 @dataclass