diff --git a/73.md b/73.md
index d883e791..545c961d 100644
--- a/73.md
+++ b/73.md
@@ -20,6 +20,7 @@ There are certain established global content identifiers such as [Book ISBNs](ht
 | Geohashes              | "geo:`<geohash, lowercase>`"                               | "geo"                    |
 | Movies                 | "isan:`<id, without version part>`"                        | "isan"                   |
 | Papers                 | "doi:`<id, lowercase>`"                                    | "doi"                    |
+| Music pieces           | "isrc:`<id, uppercase>`"                                   | "isrc"                    |
 | Hashtags               | "#`<topic, lowercase>`"                                    | "#"                      |
 | Podcast Feeds          | "podcast:guid:`<guid>`"                                    | "podcast:guid"           |
 | Podcast Episodes       | "podcast:item:guid:`<guid>`"                               | "podcast:item:guid"      |
diff --git a/F3.md b/F3.md
index 8f6c6d19..591bd6c4 100644
--- a/F3.md
+++ b/F3.md
@@ -12,6 +12,7 @@ This NIP defines `kind:1073` as a _scrobble_ event. It has the following format:
 {
   "kind": 1073,
   "tags": [
+    ["i", "isrc:<code>"],
     ["title", "<song title>"],
     ["album", "<song album>", "<optional variant>"],
     ["artist", "<musician or band>", "<optional variant>"]