diff --git a/.changeset/thirty-years-look.md b/.changeset/thirty-years-look.md
new file mode 100644
index 000000000000..bf8435446302
--- /dev/null
+++ b/.changeset/thirty-years-look.md
@@ -0,0 +1,5 @@
+---
+'@eth-optimism/data-transport-layer': minor
+---
+
+Define L1 Starting block via OwnershipTransferred (occurring on block 1) rather than AddressSet (occuring on block 2 onwards)
diff --git a/packages/data-transport-layer/src/services/l1-ingestion/service.ts b/packages/data-transport-layer/src/services/l1-ingestion/service.ts
index 62ca2bd38fef..ad8894c8db5c 100644
--- a/packages/data-transport-layer/src/services/l1-ingestion/service.ts
+++ b/packages/data-transport-layer/src/services/l1-ingestion/service.ts
@@ -423,7 +423,7 @@ export class L1IngestionService extends BaseService<L1IngestionServiceOptions> {
 
     for (let i = 0; i < currentL1Block; i += 1000000) {
       const events = await this.state.contracts.Lib_AddressManager.queryFilter(
-        this.state.contracts.Lib_AddressManager.filters.AddressSet(),
+        this.state.contracts.Lib_AddressManager.filters.OwnershipTransferred(),
         i,
         Math.min(i + 1000000, currentL1Block)
       )