diff --git a/src/db/cauldron/pool.rs b/src/db/cauldron/pool.rs
index 9a5276d..006ae37 100644
--- a/src/db/cauldron/pool.rs
+++ b/src/db/cauldron/pool.rs
@@ -29,7 +29,9 @@ pub fn create_table(conn: &Connection) {
             utxo TEXT PRIMARY KEY REFERENCES utxo_funding(new_utxo_hash) ON DELETE CASCADE,
             pool TEXT REFERENCES pool(creation_utxo) ON DELETE CASCADE,
             txid TEXT REFERENCES tx(txid) ON DELETE CASCADE,
-            tx_pos TEXT NOT NULL
+            tx_pos TEXT NOT NULL,
+            mtp_timestamp BIGINT,
+            first_seen_timestamp BIGINT
         )",
         [],
     )
@@ -83,10 +85,18 @@ fn insert_pool_history_entry(
     conn: &Connection,
     pool: &OutPointHash,
     cauldron: &ParsedContract,
+    mtp_timestamp: Option<u64>,
+    first_seen_timestamp: Option<u64>,
 ) -> Result<()> {
-    // or replace, as it could have been added in mempool, then block
     conn.execute(
-        "INSERT OR REPLACE INTO pool_history_entry (utxo, pool, txid, tx_pos) VALUES (?, ?, ?, ?)",
+        "INSERT INTO pool_history_entry (utxo, pool, txid, tx_pos, mtp_timestamp, first_seen_timestamp)
+         VALUES (?, ?, ?, ?, ?, ?)
+         ON CONFLICT(utxo) DO UPDATE SET
+            pool = excluded.pool,
+            txid = excluded.txid,
+            tx_pos = excluded.tx_pos,
+            mtp_timestamp = COALESCE(excluded.mtp_timestamp, pool_history_entry.mtp_timestamp),
+            first_seen_timestamp = COALESCE(excluded.first_seen_timestamp, pool_history_entry.first_seen_timestamp)",
         params![
             cauldron
                 .new_utxo_hash
@@ -100,13 +110,20 @@ fn insert_pool_history_entry(
             cauldron
                 .new_utxo_n
                 .expect("utxo index of new pool history entry"),
+            mtp_timestamp,
+            first_seen_timestamp,
         ],
     )
     .context("inserting pool_history_entry")?;
     Ok(())
 }
 
-pub fn update_pool_history(conn: &Connection, cauldrons: Vec<ParsedContract>) -> Result<()> {
+pub fn update_pool_history(
+    conn: &Connection,
+    cauldrons: Vec<ParsedContract>,
+    mtp_timestamp: Option<u64>,
+    first_seen_timestamp: Option<u64>,
+) -> Result<()> {
     if cauldrons.is_empty() {
         return Ok(());
     }
@@ -158,10 +175,22 @@ pub fn update_pool_history(conn: &Connection, cauldrons: Vec<ParsedContract>) ->
                     .to_hex()
             );
             insert_new_pool(conn, &current)?;
-            insert_pool_history_entry(conn, &pool_utxo, &current)?;
+            insert_pool_history_entry(
+                conn,
+                &pool_utxo,
+                &current,
+                mtp_timestamp,
+                first_seen_timestamp,
+            )?;
         } else {
             debug!("New entry for pool {}", pool_utxo.to_hex());
-            insert_pool_history_entry(conn, &pool_utxo, &current)?;
+            insert_pool_history_entry(
+                conn,
+                &pool_utxo,
+                &current,
+                mtp_timestamp,
+                first_seen_timestamp,
+            )?;
         }
     }
 
diff --git a/src/db/cauldron/tx.rs b/src/db/cauldron/tx.rs
index a79b52a..3816ab0 100644
--- a/src/db/cauldron/tx.rs
+++ b/src/db/cauldron/tx.rs
@@ -2,7 +2,6 @@
 //
 // This software is licensed under the GNU Affero General Public License (AGPL), version 3.0 or later.
 // A copy of the license can be found in the LICENSE file or at https://www.gnu.org/licenses/agpl-3.0.html
-use std::time::{SystemTime, UNIX_EPOCH};
 
 use anyhow::Result;
 use bitcoin_hashes::hex::{FromHex, ToHex};
@@ -35,18 +34,17 @@ pub fn insert_block_tx(
     Ok(())
 }
 
-pub fn insert_mempool_tx(conn: &rusqlite::Connection, txid: &Txid) -> Result<()> {
+pub fn insert_mempool_tx(
+    conn: &rusqlite::Connection,
+    txid: &Txid,
+    first_seen_timestamp: u64,
+) -> Result<()> {
     let sql = "INSERT INTO tx (txid, first_seen_timestamp)
                VALUES (?1, ?2)
                ON CONFLICT(txid) DO UPDATE SET
                first_seen_timestamp = excluded.first_seen_timestamp";
 
-    let current_timestamp = SystemTime::now()
-        .duration_since(UNIX_EPOCH)
-        .unwrap()
-        .as_secs() as i64;
-
-    conn.execute(sql, params![&txid.to_hex(), current_timestamp])?;
+    conn.execute(sql, params![&txid.to_hex(), first_seen_timestamp])?;
     Ok(())
 }
 
diff --git a/src/index.rs b/src/index.rs
index 61a87b6..eb003bd 100644
--- a/src/index.rs
+++ b/src/index.rs
@@ -6,6 +6,7 @@
 use std::{
     collections::HashSet,
     sync::{mpsc::sync_channel, Arc, Mutex},
+    time::{SystemTime, UNIX_EPOCH},
 };
 
 use bitcoin_hashes::hex::{FromHex, ToHex};
@@ -74,10 +75,15 @@ pub fn update_mempool(db: DBPool, electrum: Arc<Mutex<Client>>) -> Result<()> {
         db::cauldron::mempool::delete_mempool_tx(&db_tx, txid)?;
     }
 
+    let current_timestamp = SystemTime::now()
+        .duration_since(UNIX_EPOCH)
+        .unwrap()
+        .as_secs();
+
     for tx in txs_to_add {
         let txid = tx.txid();
         debug!("mempool add {}", txid.to_hex());
-        db::cauldron::tx::insert_mempool_tx(&db_tx, &txid)?;
+        db::cauldron::tx::insert_mempool_tx(&db_tx, &txid, current_timestamp)?;
         let cauldrons: Vec<ParsedContract> = tx
             .input
             .iter()
@@ -92,7 +98,7 @@ pub fn update_mempool(db: DBPool, electrum: Arc<Mutex<Client>>) -> Result<()> {
         all_cauldrons.extend(cauldrons);
     }
 
-    db::cauldron::pool::update_pool_history(&db_tx, all_cauldrons)
+    db::cauldron::pool::update_pool_history(&db_tx, all_cauldrons, None, Some(current_timestamp))
         .context("update pool history")?;
 
     Ok(db_tx.commit()?)
@@ -236,7 +242,7 @@ pub fn index_blocks(
         }
 
         // Figuring out initial utxo needs to be done on all cauldrons in a block.
-        db::cauldron::pool::update_pool_history(&db_tx, all_cauldrons)
+        db::cauldron::pool::update_pool_history(&db_tx, all_cauldrons, Some(mtp), None)
             .context("update pool history")?;
         config_set(&db_tx, KEY_LAST_INDEXED, &blockhash.to_hex());