diff --git a/releases/firmware-btc-v9.21.0/assertion-benma.sig b/releases/firmware-btc-v9.21.0/assertion-benma.sig
new file mode 100644
index 000000000..3640d37ac
Binary files /dev/null and b/releases/firmware-btc-v9.21.0/assertion-benma.sig differ
diff --git a/releases/firmware-btc-v9.21.0/assertion.txt b/releases/firmware-btc-v9.21.0/assertion.txt
new file mode 100644
index 000000000..c184be2d9
--- /dev/null
+++ b/releases/firmware-btc-v9.21.0/assertion.txt
@@ -0,0 +1,8 @@
+By signing this file, the signer confirms that the firmware binary built from:
+
+git tag firmware-btc-only/v9.21.0
+git commit hash 4ef6bd8f185fe47dded1f9d4cdb44d82a5609e0a
+
+resulted, at the time of signing, in a firmware binary file with the following sha256sum:
+
+36895857c346c1fbd0d206853b7031e985c1a959e9f7f9396a7ae94dfffa9679
diff --git a/releases/firmware-v9.21.0/assertion-benma.sig b/releases/firmware-v9.21.0/assertion-benma.sig
new file mode 100644
index 000000000..26796c455
Binary files /dev/null and b/releases/firmware-v9.21.0/assertion-benma.sig differ
diff --git a/releases/firmware-v9.21.0/assertion.txt b/releases/firmware-v9.21.0/assertion.txt
new file mode 100644
index 000000000..f0610ab20
--- /dev/null
+++ b/releases/firmware-v9.21.0/assertion.txt
@@ -0,0 +1,8 @@
+By signing this file, the signer confirms that the firmware binary built from:
+
+git tag firmware/v9.21.0
+git commit hash 4ef6bd8f185fe47dded1f9d4cdb44d82a5609e0a
+
+resulted, at the time of signing, in a firmware binary file with the following sha256sum:
+
+35c691d69d22f96cb0efc201dddf57c25afd09c850104925b8cea6d7f60850f5