diff --git a/server/app/com/xsn/explorer/data/anorm/dao/BlockFilterPostgresDAO.scala b/server/app/com/xsn/explorer/data/anorm/dao/BlockFilterPostgresDAO.scala
index d513906..f4fdf49 100644
--- a/server/app/com/xsn/explorer/data/anorm/dao/BlockFilterPostgresDAO.scala
+++ b/server/app/com/xsn/explorer/data/anorm/dao/BlockFilterPostgresDAO.scala
@@ -40,4 +40,16 @@ class BlockFilterPostgresDAO {
       'blockhash -> blockhash.string
     ).as(parseFilter.singleOpt)
   }
+
+  def getBy(blockhash: Blockhash)(implicit conn: Connection): Option[GolombCodedSet] = {
+    SQL(
+      """
+        |SELECT blockhash, m, n, p, hex
+        |FROM block_address_gcs
+        |WHERE blockhash = {blockhash}
+      """.stripMargin
+    ).on(
+      'blockhash -> blockhash.string
+    ).as(parseFilter.singleOpt)
+  }
 }
diff --git a/server/app/com/xsn/explorer/data/anorm/dao/BlockPostgresDAO.scala b/server/app/com/xsn/explorer/data/anorm/dao/BlockPostgresDAO.scala
index 47fc553..3fad497 100644
--- a/server/app/com/xsn/explorer/data/anorm/dao/BlockPostgresDAO.scala
+++ b/server/app/com/xsn/explorer/data/anorm/dao/BlockPostgresDAO.scala
@@ -12,7 +12,9 @@ import com.xsn.explorer.models.persisted.{Block, BlockHeader}
 import com.xsn.explorer.models.values.{Blockhash, Height}
 import javax.inject.Inject
 
-class BlockPostgresDAO @Inject() (fieldOrderingSQLInterpreter: FieldOrderingSQLInterpreter) {
+class BlockPostgresDAO @Inject() (
+    blockFilterPostgresDAO: BlockFilterPostgresDAO,
+    fieldOrderingSQLInterpreter: FieldOrderingSQLInterpreter) {
 
   def insert(block: Block)(implicit conn: Connection): Option[Block] = {
     SQL(
@@ -154,7 +156,7 @@ class BlockPostgresDAO @Inject() (fieldOrderingSQLInterpreter: FieldOrderingSQLI
   def getHeaders(limit: Limit, orderingCondition: OrderingCondition)(implicit conn: Connection): List[BlockHeader] = {
     val order = toSQL(orderingCondition)
 
-    SQL(
+    val headers = SQL(
       s"""
         |SELECT blockhash, previous_blockhash, merkle_root, height, time
         |FROM blocks
@@ -164,6 +166,13 @@ class BlockPostgresDAO @Inject() (fieldOrderingSQLInterpreter: FieldOrderingSQLI
     ).on(
       'limit -> limit.int
     ).as(parseHeader.*)
+
+    for {
+      header <- headers
+      filterMaybe = blockFilterPostgresDAO.getBy(header.hash)
+    } yield filterMaybe
+        .map(header.withFilter)
+        .getOrElse(header)
   }
 
   def getHeaders(lastSeenHash: Blockhash, limit: Limit, orderingCondition: OrderingCondition)(implicit conn: Connection): List[BlockHeader] = {
@@ -173,7 +182,7 @@ class BlockPostgresDAO @Inject() (fieldOrderingSQLInterpreter: FieldOrderingSQLI
       case OrderingCondition.AscendingOrder => ">"
     }
 
-    SQL(
+    val headers = SQL(
       s"""
         |WITH CTE AS (
         |  SELECT height as lastSeenHeight
@@ -190,6 +199,13 @@ class BlockPostgresDAO @Inject() (fieldOrderingSQLInterpreter: FieldOrderingSQLI
       'lastSeenHash -> lastSeenHash.string,
       'limit -> limit.int
     ).as(parseHeader.*)
+
+    for {
+      header <- headers
+      filterMaybe = blockFilterPostgresDAO.getBy(header.hash)
+    } yield filterMaybe
+        .map(header.withFilter)
+        .getOrElse(header)
   }
 
   private def toSQL(condition: OrderingCondition): String = condition match {
diff --git a/server/app/com/xsn/explorer/models/persisted/BlockHeader.scala b/server/app/com/xsn/explorer/models/persisted/BlockHeader.scala
index 574f4c4..5a1a42f 100644
--- a/server/app/com/xsn/explorer/models/persisted/BlockHeader.scala
+++ b/server/app/com/xsn/explorer/models/persisted/BlockHeader.scala
@@ -5,7 +5,7 @@ import com.xsn.explorer.models.values._
 import io.scalaland.chimney.dsl._
 import play.api.libs.json.{Json, Writes}
 
-sealed trait BlockHeader {
+sealed trait BlockHeader extends Product with Serializable {
 
   def hash: Blockhash
   def previousBlockhash: Option[Blockhash]
diff --git a/server/test/com/xsn/explorer/data/BlockPostgresDataHandlerSpec.scala b/server/test/com/xsn/explorer/data/BlockPostgresDataHandlerSpec.scala
index cf46a52..14a7295 100644
--- a/server/test/com/xsn/explorer/data/BlockPostgresDataHandlerSpec.scala
+++ b/server/test/com/xsn/explorer/data/BlockPostgresDataHandlerSpec.scala
@@ -2,12 +2,10 @@ package com.xsn.explorer.data
 
 import com.alexitc.playsonify.models.ordering.{FieldOrdering, OrderingCondition}
 import com.alexitc.playsonify.models.pagination.{Count, Limit, Offset, PaginatedQuery}
-import com.alexitc.playsonify.sql.FieldOrderingSQLInterpreter
 import com.xsn.explorer.data.anorm.BlockPostgresDataHandler
-import com.xsn.explorer.data.anorm.dao.BlockPostgresDAO
 import com.xsn.explorer.data.common.PostgresDataHandlerSpec
 import com.xsn.explorer.errors.BlockNotFoundError
-import com.xsn.explorer.helpers.BlockLoader
+import com.xsn.explorer.helpers.{BlockLoader, DataHandlerObjects}
 import com.xsn.explorer.models.fields.BlockField
 import com.xsn.explorer.models.persisted.Block
 import com.xsn.explorer.models.values.Blockhash
@@ -16,12 +14,14 @@ import org.scalatest.BeforeAndAfter
 
 class BlockPostgresDataHandlerSpec extends PostgresDataHandlerSpec with BeforeAndAfter {
 
+  import DataHandlerObjects._
+
   before {
     clearDatabase()
   }
 
+  val dao = blockPostgresDAO
   val defaultOrdering = FieldOrdering(BlockField.Height, OrderingCondition.AscendingOrder)
-  lazy val dao = new BlockPostgresDAO(new FieldOrderingSQLInterpreter)
   lazy val dataHandler = new BlockPostgresDataHandler(database, dao)
 
   def insert(block: Block) = {
diff --git a/server/test/com/xsn/explorer/helpers/DataHandlerObjects.scala b/server/test/com/xsn/explorer/helpers/DataHandlerObjects.scala
index af72693..c980675 100644
--- a/server/test/com/xsn/explorer/helpers/DataHandlerObjects.scala
+++ b/server/test/com/xsn/explorer/helpers/DataHandlerObjects.scala
@@ -16,8 +16,8 @@ trait DataHandlerObjects {
     transactionOutputDAO,
     addressTransactionDetailsDAO,
     fieldOrderingSQLInterpreter)
-  lazy val blockPostgresDAO = new BlockPostgresDAO(fieldOrderingSQLInterpreter)
   lazy val blockFilterPostgresDAO = new BlockFilterPostgresDAO
+  lazy val blockPostgresDAO = new BlockPostgresDAO(blockFilterPostgresDAO, fieldOrderingSQLInterpreter)
   lazy val balancePostgresDAO = new BalancePostgresDAO(fieldOrderingSQLInterpreter)
   lazy val aggregatedAmountPostgresDAO = new AggregatedAmountPostgresDAO