diff --git a/include/bitcoin/node/protocols/protocol_block_in_31800.hpp b/include/bitcoin/node/protocols/protocol_block_in_31800.hpp
index 012a9ffc..3013cb1b 100644
--- a/include/bitcoin/node/protocols/protocol_block_in_31800.hpp
+++ b/include/bitcoin/node/protocols/protocol_block_in_31800.hpp
@@ -75,7 +75,7 @@ class BCN_API protocol_block_in_31800
         const network::messages::peer::block::cptr& message) NOEXCEPT;
 
 private:
-    code check(const system::chain::block& block,
+    code check(const system::chain::block_view& block,
         const system::chain::context& ctx, bool bypass) const NOEXCEPT;
 
     void send_get_data(const map_ptr& map, const job::ptr& job) NOEXCEPT;
diff --git a/src/protocols/protocol_block_in_106.cpp b/src/protocols/protocol_block_in_106.cpp
index 54227df3..b39588e3 100644
--- a/src/protocols/protocol_block_in_106.cpp
+++ b/src/protocols/protocol_block_in_106.cpp
@@ -123,25 +123,26 @@ bool protocol_block_in_106::handle_receive_inventory(const code& ec,
 
 // Process block responses in order as dictated by tracker.
 bool protocol_block_in_106::handle_receive_block(const code& ec,
-    const block::cptr& message) NOEXCEPT
+    const block::cptr& ) NOEXCEPT
 {
     BC_ASSERT(stranded());
 
     if (stopped(ec))
         return false;
 
-    const auto& block_ptr = message->block_ptr;
-
-    // Unrequested block, may not have been announced via inventory.
-    if (tracker_.ids.find(block_ptr->get_hash()) == tracker_.ids.end())
-    {
-        LOGP("Unrequested block [" << encode_hash(block_ptr->get_hash())
-            << "] from [" << opposite() << "].");
-        return true;
-    }
-
-    // Inventory backlog is limited to 500 per channel.
-    organize(block_ptr, BIND(handle_organize, _1, _2, block_ptr));
+    // TODO: add `chain::block get_block() const` method to message.
+    ////const auto& block_ptr = message->block_ptr;
+    ////
+    ////// Unrequested block, may not have been announced via inventory.
+    ////if (tracker_.ids.find(block_ptr->get_hash()) == tracker_.ids.end())
+    ////{
+    ////    LOGP("Unrequested block [" << encode_hash(block_ptr->get_hash())
+    ////        << "] from [" << opposite() << "].");
+    ////    return true;
+    ////}
+    ////
+    ////// Inventory backlog is limited to 500 per channel.
+    ////organize(block_ptr, BIND(handle_organize, _1, _2, block_ptr));
     return true;
 }
 
diff --git a/src/protocols/protocol_block_in_31800.cpp b/src/protocols/protocol_block_in_31800.cpp
index d5afee49..c9f4f5f3 100644
--- a/src/protocols/protocol_block_in_31800.cpp
+++ b/src/protocols/protocol_block_in_31800.cpp
@@ -274,8 +274,8 @@ bool protocol_block_in_31800::handle_receive_block(const code& ec,
     // Preconditions.
     // ........................................................................
 
-    const auto& block = message->block_ptr;
-    const auto& hash = block->get_hash();
+    const auto& block = message->block;
+    const auto hash = block.hash();
     const auto it = map_->find(hash);
     auto& query = archive();
 
@@ -300,15 +300,15 @@ bool protocol_block_in_31800::handle_receive_block(const code& ec,
     // only stored when a strong header has been stored, later to be found out
     // as invalid and not malleable. Stored invalidity prevents repeat
     // processing of the same invalid chain but is not necessary or desirable.
-    if (const auto code = check(*block, it->context, bypass))
+    if (const auto code = check(block, it->context, bypass))
     {
         if (code == system::error::invalid_transaction_commitment ||
             code == system::error::invalid_witness_commitment)
         {
             LOGR("Malleated block [" << encode_hash(hash) << ":" << height
                 << "] from [" << opposite() << "] " << code.message()
-                << " txs(" << block->transactions() << ")"
-                << " segregated(" << block->is_segregated() << ").");
+                << " txs(" << block.transactions() << ")"
+                << " segregated(" << block.is_segregated() << ").");
             stop(code);
             return false;
         }
@@ -330,7 +330,7 @@ bool protocol_block_in_31800::handle_receive_block(const code& ec,
     // Commit block.txs.
     // ........................................................................
 
-    if (const auto code = query.set_code(*block, link, checked, bypass, height))
+    if (const auto code = query.set_code(block, link, checked, bypass, height))
     {
         LOGF("Failure storing block [" << encode_hash(hash) << ":" << height
             << "] from [" << opposite() << "] " << code.message());
@@ -348,7 +348,7 @@ bool protocol_block_in_31800::handle_receive_block(const code& ec,
     notify(ec, chase::checked, height);
     fire(events::block_archived, height);
 
-    count(block->serialized_size(true));
+    count(block.serialized_size(true));
     map_->erase(it);
     if (is_idle())
     {
@@ -359,10 +359,10 @@ bool protocol_block_in_31800::handle_receive_block(const code& ec,
     return true;
 }
 
-// Identity is correct unless error::invalid_witness_commitment or
-// error::invalid_transaction_commitment is returned. Only identity is required
-// under bypass. Header state is checked by organize. 
-code protocol_block_in_31800::check(const chain::block& block,
+// Header is checked by organize, Check/Accept/Connect are called by validate.
+// While check could be called here, it's more optimal to defer to validate, as
+// requiring only identity here allows the use of the simplified block_view.
+code protocol_block_in_31800::check(const chain::block_view& block,
     const chain::context& ctx, bool) const NOEXCEPT
 {
     code ec{};