diff --git a/gen/pb-go/common/v1/sigstore_common.pb.go b/gen/pb-go/common/v1/sigstore_common.pb.go
index 5645106e..be8e2e78 100644
--- a/gen/pb-go/common/v1/sigstore_common.pb.go
+++ b/gen/pb-go/common/v1/sigstore_common.pb.go
@@ -175,8 +175,8 @@ type SupportedAlgorithm int32
 const (
 	SupportedAlgorithm_SUPPORTED_ALGORITHM_UNSPECIFIED SupportedAlgorithm = 0
 	SupportedAlgorithm_ECDSA_SHA2_256_NISTP256         SupportedAlgorithm = 1
-	SupportedAlgorithm_ECDSA_SHA2_256_NISTP521         SupportedAlgorithm = 2
 	SupportedAlgorithm_ECDSA_SHA2_384_NISTP384         SupportedAlgorithm = 3
+	SupportedAlgorithm_ECDSA_SHA2_512_NISTP521         SupportedAlgorithm = 2
 	SupportedAlgorithm_ED25519                         SupportedAlgorithm = 4
 	SupportedAlgorithm_ED25519_PH                      SupportedAlgorithm = 5
 )
@@ -186,16 +186,16 @@ var (
 	SupportedAlgorithm_name = map[int32]string{
 		0: "SUPPORTED_ALGORITHM_UNSPECIFIED",
 		1: "ECDSA_SHA2_256_NISTP256",
-		2: "ECDSA_SHA2_256_NISTP521",
 		3: "ECDSA_SHA2_384_NISTP384",
+		2: "ECDSA_SHA2_512_NISTP521",
 		4: "ED25519",
 		5: "ED25519_PH",
 	}
 	SupportedAlgorithm_value = map[string]int32{
 		"SUPPORTED_ALGORITHM_UNSPECIFIED": 0,
 		"ECDSA_SHA2_256_NISTP256":         1,
-		"ECDSA_SHA2_256_NISTP521":         2,
 		"ECDSA_SHA2_384_NISTP384":         3,
+		"ECDSA_SHA2_512_NISTP521":         2,
 		"ED25519":                         4,
 		"ED25519_PH":                      5,
 	}
@@ -1173,10 +1173,10 @@ var file_sigstore_common_proto_rawDesc = []byte{
 	0x52, 0x49, 0x54, 0x48, 0x4d, 0x5f, 0x55, 0x4e, 0x53, 0x50, 0x45, 0x43, 0x49, 0x46, 0x49, 0x45,
 	0x44, 0x10, 0x00, 0x12, 0x1b, 0x0a, 0x17, 0x45, 0x43, 0x44, 0x53, 0x41, 0x5f, 0x53, 0x48, 0x41,
 	0x32, 0x5f, 0x32, 0x35, 0x36, 0x5f, 0x4e, 0x49, 0x53, 0x54, 0x50, 0x32, 0x35, 0x36, 0x10, 0x01,
-	0x12, 0x1b, 0x0a, 0x17, 0x45, 0x43, 0x44, 0x53, 0x41, 0x5f, 0x53, 0x48, 0x41, 0x32, 0x5f, 0x32,
-	0x35, 0x36, 0x5f, 0x4e, 0x49, 0x53, 0x54, 0x50, 0x35, 0x32, 0x31, 0x10, 0x02, 0x12, 0x1b, 0x0a,
-	0x17, 0x45, 0x43, 0x44, 0x53, 0x41, 0x5f, 0x53, 0x48, 0x41, 0x32, 0x5f, 0x33, 0x38, 0x34, 0x5f,
-	0x4e, 0x49, 0x53, 0x54, 0x50, 0x33, 0x38, 0x34, 0x10, 0x03, 0x12, 0x0b, 0x0a, 0x07, 0x45, 0x44,
+	0x12, 0x1b, 0x0a, 0x17, 0x45, 0x43, 0x44, 0x53, 0x41, 0x5f, 0x53, 0x48, 0x41, 0x32, 0x5f, 0x33,
+	0x38, 0x34, 0x5f, 0x4e, 0x49, 0x53, 0x54, 0x50, 0x33, 0x38, 0x34, 0x10, 0x03, 0x12, 0x1b, 0x0a,
+	0x17, 0x45, 0x43, 0x44, 0x53, 0x41, 0x5f, 0x53, 0x48, 0x41, 0x32, 0x5f, 0x35, 0x31, 0x32, 0x5f,
+	0x4e, 0x49, 0x53, 0x54, 0x50, 0x35, 0x32, 0x31, 0x10, 0x02, 0x12, 0x0b, 0x0a, 0x07, 0x45, 0x44,
 	0x32, 0x35, 0x35, 0x31, 0x39, 0x10, 0x04, 0x12, 0x0e, 0x0a, 0x0a, 0x45, 0x44, 0x32, 0x35, 0x35,
 	0x31, 0x39, 0x5f, 0x50, 0x48, 0x10, 0x05, 0x2a, 0x6f, 0x0a, 0x1a, 0x53, 0x75, 0x62, 0x6a, 0x65,
 	0x63, 0x74, 0x41, 0x6c, 0x74, 0x65, 0x72, 0x6e, 0x61, 0x74, 0x69, 0x76, 0x65, 0x4e, 0x61, 0x6d,
diff --git a/gen/pb-python/sigstore_protobuf_specs/dev/sigstore/common/v1/__init__.py b/gen/pb-python/sigstore_protobuf_specs/dev/sigstore/common/v1/__init__.py
index 80572f17..0723ee8d 100644
--- a/gen/pb-python/sigstore_protobuf_specs/dev/sigstore/common/v1/__init__.py
+++ b/gen/pb-python/sigstore_protobuf_specs/dev/sigstore/common/v1/__init__.py
@@ -60,8 +60,8 @@ class SupportedAlgorithm(betterproto.Enum):
 
     SUPPORTED_ALGORITHM_UNSPECIFIED = 0
     ECDSA_SHA2_256_NISTP256 = 1
-    ECDSA_SHA2_256_NISTP521 = 2
     ECDSA_SHA2_384_NISTP384 = 3
+    ECDSA_SHA2_512_NISTP521 = 2
     ED25519 = 4
     ED25519_PH = 5
 
diff --git a/gen/pb-ruby/lib/sigstore_common_pb.rb b/gen/pb-ruby/lib/sigstore_common_pb.rb
index 37c838a2..59debb11 100644
--- a/gen/pb-ruby/lib/sigstore_common_pb.rb
+++ b/gen/pb-ruby/lib/sigstore_common_pb.rb
@@ -75,8 +75,8 @@
     add_enum "dev.sigstore.common.v1.SupportedAlgorithm" do
       value :SUPPORTED_ALGORITHM_UNSPECIFIED, 0
       value :ECDSA_SHA2_256_NISTP256, 1
-      value :ECDSA_SHA2_256_NISTP521, 2
       value :ECDSA_SHA2_384_NISTP384, 3
+      value :ECDSA_SHA2_512_NISTP521, 2
       value :ED25519, 4
       value :ED25519_PH, 5
     end
diff --git a/gen/pb-typescript/src/__generated__/sigstore_common.ts b/gen/pb-typescript/src/__generated__/sigstore_common.ts
index 6037f568..b2d3907d 100644
--- a/gen/pb-typescript/src/__generated__/sigstore_common.ts
+++ b/gen/pb-typescript/src/__generated__/sigstore_common.ts
@@ -130,8 +130,8 @@ export function publicKeyDetailsToJSON(object: PublicKeyDetails): string {
 export enum SupportedAlgorithm {
   SUPPORTED_ALGORITHM_UNSPECIFIED = 0,
   ECDSA_SHA2_256_NISTP256 = 1,
-  ECDSA_SHA2_256_NISTP521 = 2,
   ECDSA_SHA2_384_NISTP384 = 3,
+  ECDSA_SHA2_512_NISTP521 = 2,
   ED25519 = 4,
   ED25519_PH = 5,
 }
@@ -144,12 +144,12 @@ export function supportedAlgorithmFromJSON(object: any): SupportedAlgorithm {
     case 1:
     case "ECDSA_SHA2_256_NISTP256":
       return SupportedAlgorithm.ECDSA_SHA2_256_NISTP256;
-    case 2:
-    case "ECDSA_SHA2_256_NISTP521":
-      return SupportedAlgorithm.ECDSA_SHA2_256_NISTP521;
     case 3:
     case "ECDSA_SHA2_384_NISTP384":
       return SupportedAlgorithm.ECDSA_SHA2_384_NISTP384;
+    case 2:
+    case "ECDSA_SHA2_512_NISTP521":
+      return SupportedAlgorithm.ECDSA_SHA2_512_NISTP521;
     case 4:
     case "ED25519":
       return SupportedAlgorithm.ED25519;
@@ -167,10 +167,10 @@ export function supportedAlgorithmToJSON(object: SupportedAlgorithm): string {
       return "SUPPORTED_ALGORITHM_UNSPECIFIED";
     case SupportedAlgorithm.ECDSA_SHA2_256_NISTP256:
       return "ECDSA_SHA2_256_NISTP256";
-    case SupportedAlgorithm.ECDSA_SHA2_256_NISTP521:
-      return "ECDSA_SHA2_256_NISTP521";
     case SupportedAlgorithm.ECDSA_SHA2_384_NISTP384:
       return "ECDSA_SHA2_384_NISTP384";
+    case SupportedAlgorithm.ECDSA_SHA2_512_NISTP521:
+      return "ECDSA_SHA2_512_NISTP521";
     case SupportedAlgorithm.ED25519:
       return "ED25519";
     case SupportedAlgorithm.ED25519_PH:
diff --git a/protos/sigstore_common.proto b/protos/sigstore_common.proto
index c5c3e509..6edaaaa7 100644
--- a/protos/sigstore_common.proto
+++ b/protos/sigstore_common.proto
@@ -79,8 +79,8 @@ message HashOutput {
 enum SupportedAlgorithm {
         SUPPORTED_ALGORITHM_UNSPECIFIED = 0;
         ECDSA_SHA2_256_NISTP256 = 1;
-        ECDSA_SHA2_256_NISTP521 = 2;
         ECDSA_SHA2_384_NISTP384 = 3;
+        ECDSA_SHA2_512_NISTP521 = 2;
         ED25519 = 4;
         ED25519_PH = 5;
 }