diff --git a/docs/TapTrade_obs/.obsidian/workspace.json b/docs/TapTrade_obs/.obsidian/workspace.json
index c304016..a975f5d 100644
--- a/docs/TapTrade_obs/.obsidian/workspace.json
+++ b/docs/TapTrade_obs/.obsidian/workspace.json
@@ -148,17 +148,18 @@
   },
   "active": "bdb9fd88a01a8909",
   "lastOpenFiles": [
+    "Research/Bitcoin fundamentals/Signature and Flags.canvas",
     "Research/Trade Pipelines/new concepts/concept pipeline 1.canvas",
     "Research/Trade Pipelines/new concepts/concept locking script 1.canvas",
+    "Research/Implementation/CLI demonstrator architecture/demonstrator architecture.canvas",
+    "Research/Bitcoin fundamentals/Knowledge sources.md",
     "Research/Implementation/UI ideas.canvas",
     "Research/Implementation/Libraries.md",
-    "Research/Implementation/CLI demonstrator architecture/demonstrator architecture.canvas",
     "Research/Trade Pipelines/Existing research.md",
     "Research/Trade Pipelines/current trade flow.canvas",
     "Research/Implementation/CLI demonstrator architecture",
     "Research/Trade Pipelines/new concepts/Untitled.md",
     "Research/Bitcoin fundamentals/Taproot output structure.canvas",
-    "Research/Bitcoin fundamentals/Spending Taproot UTXOs.md",
-    "Research/Bitcoin fundamentals/Knowledge sources.md"
+    "Research/Bitcoin fundamentals/Spending Taproot UTXOs.md"
   ]
 }
\ No newline at end of file
diff --git a/docs/TapTrade_obs/Research/Bitcoin fundamentals/Knowledge sources.md b/docs/TapTrade_obs/Research/Bitcoin fundamentals/Knowledge sources.md
index f5c75f1..be8be15 100644
--- a/docs/TapTrade_obs/Research/Bitcoin fundamentals/Knowledge sources.md	
+++ b/docs/TapTrade_obs/Research/Bitcoin fundamentals/Knowledge sources.md	
@@ -7,7 +7,7 @@ Understanding the following BIPs is relevant for the project.
 * [BIP 341 - SegWit version 1 spending rules](https://github.com/bitcoin/bips/blob/master/bip-0341.mediawiki)
 * [BIP 342 - Validation of Taproot Scripts](https://github.com/bitcoin/bips/blob/master/bip-0342.mediawiki)
 * [BIP 114(Rejected but interesting) - Merkelized Abstract Syntax Tree](https://github.com/bitcoin/bips/blob/master/bip-0114.mediawiki)
-
+* [BIP 65 - OP_CHECKLOCKTIMEVERIFY](https://github.com/bitcoin/bips/blob/master/bip-0065.mediawiki)
 #### BIP Readtrough videos
 
 * [BIP 340 Readtrough - Jimmy Song](https://www.youtube.com/watch?v=rVsNFMzQUck)