diff --git a/docs/openapi/genarrative-external-v1.openapi.json b/docs/openapi/genarrative-external-v1.openapi.json
index 92732c25a..cbfc902e3 100644
--- a/docs/openapi/genarrative-external-v1.openapi.json
+++ b/docs/openapi/genarrative-external-v1.openapi.json
@@ -4047,6 +4047,8 @@
         "type": "object",
         "required": [
           "imageSrc",
+          "objectKey",
+          "assetObjectId",
           "width",
           "height"
         ],
@@ -4055,16 +4057,14 @@
             "type": "string"
           },
           "objectKey": {
-            "type": [
-              "string",
-              "null"
-            ]
+            "type": "string",
+            "minLength": 1,
+            "description": "帧对应的稳定 OSS Object Key；服务端据此重建持久 imageSrc，不能只提交临时签名 URL。"
           },
           "assetObjectId": {
-            "type": [
-              "string",
-              "null"
-            ]
+            "type": "string",
+            "minLength": 1,
+            "description": "帧对应的稳定资产对象 ID。"
           },
           "width": {
             "type": "integer",
@@ -4076,7 +4076,7 @@
           }
         },
         "additionalProperties": false,
-        "description": "图片序列帧。数组位置是唯一播放顺序，不携带额外序号字段。"
+        "description": "图片序列帧。数组位置是唯一播放顺序，不携带额外序号字段；每帧必须同时携带 objectKey 与 assetObjectId，imageSrc 按 objectKey 规范化为持久站内路径。"
       },
       "EditorCharacterAnimationGenerationResponse": {
         "type": "object",
diff --git a/docs/【后端架构】server-rs与SpacetimeDB数据契约-2026-05-15.md b/docs/【后端架构】server-rs与SpacetimeDB数据契约-2026-05-15.md
index ada852eb6..594852369 100644
--- a/docs/【后端架构】server-rs与SpacetimeDB数据契约-2026-05-15.md
+++ b/docs/【后端架构】server-rs与SpacetimeDB数据契约-2026-05-15.md
@@ -676,6 +676,7 @@ Responses 的终态载荷既是工具调用的恢复源，也是正文的恢复
 - Rust 结构体：`EditorAsset`
 - 源码：`server-rs/crates/spacetime-module/src/editor_project_storage.rs`
 - 说明：图片画布账号级素材表，保存用户上传 / 生成素材的名称、文件夹、媒体读取地址、可选封面 `thumbnail_src`、OSS 引用、尺寸、来源类型、prompt、provider、真实操作 `task_id`、可选后台归组 `group_task_id`、拆分批次预期数量 `group_task_expected_asset_count`、`asset_kind`、`generation_inputs_json`、可选 `source_resource_id`、`generation_cost_mud_points` 和序列媒体结果字段。`asset_kind` 是唯一权威媒体类别；`image_sequence_frames_json` 与 `image_sequence_duration_ms` 保存角色动作正式结果，数组长度派生帧数、数组顺序决定播放顺序、FPS 按需推导，`generation_inputs_json` 只保存用户可见生成 / 重放输入。`prompt` 固定表示规范化后的用户原始意图，供跨资源搜索和用户侧元数据使用；provider 实际返回的改写只写 `actual_prompt`，提交给 provider 的系统 / 工程化 prompt 不得写入 `prompt`。角色透明图、图标透明图和自动切片等派生产物继承源用户 prompt，并用 `source_resource_id`、`generation_inputs_json`、provider / asset kind 表达处理来源。归组字段只用于稳定派生任务的后台分组，不替代 `task_id`；批次是否初始完整以独立完成事实为准，不按当前剩余素材数反推。素材在同一账号的所有项目中可见；图片 / 图标 / UI 提取等生成 BFF 在请求携带 `asset_folder_id` 时负责创建账号级生成素材并返回 asset 快照，若同次生成也创建了 `editor_project_resource`，则把该 `resource_id` 写入 `source_resource_id`。角色动作生成把原始绿幕预览视频作为独立 `asset_kind = video` 素材保存，再把最终帧序列作为一条 `asset_kind = character-animation` 素材入库：首帧写入 `image_src` / `thumbnail_src`，完整帧数组与图片序列毫秒时长写入两个正式媒体结果字段；生成端确认每个最终帧对象后，必须把该帧的 `objectKey` 与 `assetObjectId` 同时写入正式帧 payload，不能只在内部处理中暂存或仅保留首帧引用；存在项目上下文时，最终动作的 `source_resource_id` 指向预览视频资源。不把每帧拆成独立素材，也不重复保存预览路径。生成视频会抽取首帧封面写入 `thumbnail_src`，素材库和再次放入画布时用它作为 video poster。素材库快照通过 `asset_id` 回查对应 `editor_showcase_asset`，供左侧素材菜单展示 `pending` / `approved` / `rejected` 审核状态；公开事实不落在账号素材表，素材库只发起提交审核。素材放入画布时复制为 `editor_project_resource` 并由图层引用 resourceId，画布从 resource / asset 级元数据恢复素材类别、媒体结果和用户可见生成输入快照。
+- 正式序列帧写入边界：写入端必须逐帧取得非空 `objectKey` 与 `assetObjectId`，并始终按 `objectKey` 重建 `imageSrc` 的持久站内路径。只有临时签名 URL 而没有这两项稳定引用的 External v1 请求返回 `400`，不能进入正式素材或项目资源。
 - 索引：`by_editor_asset_owner_user_id`、`by_editor_asset_folder_id`。
 
 ### `editor_asset_group_source_provenance`
diff --git a/server-rs/crates/api-server/src/admin.rs b/server-rs/crates/api-server/src/admin.rs
index e7b22d91f..49751fd92 100644
--- a/server-rs/crates/api-server/src/admin.rs
+++ b/server-rs/crates/api-server/src/admin.rs
@@ -4360,12 +4360,14 @@ mod tests {
             {
                 "imageSrc": "/generated/action/formal-01.png",
                 "objectKey": "generated/action/formal-01.png",
+                "assetObjectId": "asset-object-formal-01",
                 "width": 192,
                 "height": 256
             },
             {
                 "imageSrc": "/generated/action/formal-02.png",
                 "objectKey": "generated/action/formal-02.png",
+                "assetObjectId": "asset-object-formal-02",
                 "width": 192,
                 "height": 256
             }
@@ -4397,8 +4399,8 @@ mod tests {
     fn admin_editor_asset_payload_preserves_formal_character_action_metadata() {
         let state = AppState::new(AppConfig::default()).expect("state should build");
         let frames = json!([
-            { "imageSrc": "/generated/action/frame-01.png", "width": 192, "height": 256 },
-            { "imageSrc": "/generated/action/frame-02.png", "width": 192, "height": 256 }
+            { "imageSrc": "/generated/action/frame-01.png", "objectKey": "generated/action/frame-01.png", "assetObjectId": "asset-object-frame-01", "width": 192, "height": 256 },
+            { "imageSrc": "/generated/action/frame-02.png", "objectKey": "generated/action/frame-02.png", "assetObjectId": "asset-object-frame-02", "width": 192, "height": 256 }
         ]);
         let mut record = test_admin_editor_asset_record(
             "action-asset",
diff --git a/server-rs/crates/api-server/src/editor_project.rs b/server-rs/crates/api-server/src/editor_project.rs
index a87430860..a785ea1ab 100644
--- a/server-rs/crates/api-server/src/editor_project.rs
+++ b/server-rs/crates/api-server/src/editor_project.rs
@@ -7140,32 +7140,39 @@ fn normalize_editor_image_sequence_frame(frame: &Value) -> Option<Value> {
     if frame.contains_key("frameIndex") {
         return None;
     }
-    let image_src = frame
+    frame
         .get("imageSrc")
         .and_then(Value::as_str)
         .map(str::trim)
         .filter(|value| !value.is_empty())?;
+    let object_key = normalize_editor_object_key(
+        frame
+            .get("objectKey")
+            .and_then(Value::as_str)
+            .map(str::to_string),
+    )?;
+    let asset_object_id = normalize_optional_string(
+        frame
+            .get("assetObjectId")
+            .and_then(Value::as_str)
+            .map(str::to_string),
+    )?;
     let width = frame.get("width").and_then(Value::as_u64)?;
     let height = frame.get("height").and_then(Value::as_u64)?;
     if width == 0 || height == 0 || u32::try_from(width).is_err() || u32::try_from(height).is_err()
     {
         return None;
     }
-    let mut normalized = serde_json::Map::from_iter([
-        ("imageSrc".to_string(), Value::String(image_src.to_string())),
+    let normalized = serde_json::Map::from_iter([
+        (
+            "imageSrc".to_string(),
+            Value::String(editor_media_src_from_object_key(&object_key)),
+        ),
+        ("objectKey".to_string(), Value::String(object_key)),
+        ("assetObjectId".to_string(), Value::String(asset_object_id)),
         ("width".to_string(), Value::from(width)),
         ("height".to_string(), Value::from(height)),
     ]);
-    for field in ["objectKey", "assetObjectId"] {
-        if let Some(value) = frame
-            .get(field)
-            .and_then(Value::as_str)
-            .map(str::trim)
-            .filter(|value| !value.is_empty())
-        {
-            normalized.insert(field.to_string(), Value::String(value.to_string()));
-        }
-    }
     Some(Value::Object(normalized))
 }
 
@@ -8594,6 +8601,35 @@ pub(crate) fn serialize_editor_image_sequence_frames(
             })),
         );
     }
+    if frames.as_array().is_some_and(|frames| {
+        frames.iter().any(|frame| {
+            let Some(frame) = frame.as_object() else {
+                return false;
+            };
+            normalize_editor_object_key(
+                frame
+                    .get("objectKey")
+                    .and_then(Value::as_str)
+                    .map(str::to_string),
+            )
+            .is_none()
+                || normalize_optional_string(
+                    frame
+                        .get("assetObjectId")
+                        .and_then(Value::as_str)
+                        .map(str::to_string),
+                )
+                .is_none()
+        })
+    }) {
+        return Err(
+            AppError::from_status(StatusCode::BAD_REQUEST).with_details(json!({
+                "provider": "editor-project",
+                "message": "图片序列帧每帧必须同时提供 objectKey 和 assetObjectId；临时签名 URL 不能作为正式帧引用。",
+                "fields": ["objectKey", "assetObjectId"],
+            })),
+        );
+    }
     let Some(frames) = normalize_editor_image_sequence_frames_value(&frames) else {
         return Err(
             AppError::from_status(StatusCode::BAD_REQUEST).with_details(json!({
@@ -9812,12 +9848,12 @@ mod tests {
     #[test]
     fn editor_asset_payload_uses_formal_sequence_fields_only() {
         let stored_formal_frames = json!([
-            { "imageSrc": "/generated/formal/frame01.png", "width": 192, "height": 256 },
-            { "imageSrc": "/generated/formal/frame02.png", "width": 192, "height": 256 }
+            { "imageSrc": "https://example.invalid/frame01.png?Signature=temporary", "objectKey": "generated/formal/frame01.png", "assetObjectId": "asset-object-frame01", "width": 192, "height": 256 },
+            { "imageSrc": "https://example.invalid/frame02.png?Signature=temporary", "objectKey": "generated/formal/frame02.png", "assetObjectId": "asset-object-frame02", "width": 192, "height": 256 }
         ]);
         let formal_frames = json!([
-            { "imageSrc": "/generated/formal/frame01.png", "width": 192, "height": 256 },
-            { "imageSrc": "/generated/formal/frame02.png", "width": 192, "height": 256 }
+            { "imageSrc": "/generated/formal/frame01.png", "objectKey": "generated/formal/frame01.png", "assetObjectId": "asset-object-frame01", "width": 192, "height": 256 },
+            { "imageSrc": "/generated/formal/frame02.png", "objectKey": "generated/formal/frame02.png", "assetObjectId": "asset-object-frame02", "width": 192, "height": 256 }
         ]);
         let record = EditorAssetRecord {
             asset_id: "editor-asset-action".to_string(),
@@ -9920,8 +9956,8 @@ mod tests {
     #[test]
     fn editor_project_resource_payload_uses_formal_sequence_fields_only() {
         let formal_frames = json!([
-            { "imageSrc": "/generated/formal/frame01.png", "width": 192, "height": 256 },
-            { "imageSrc": "/generated/formal/frame02.png", "width": 192, "height": 256 }
+            { "imageSrc": "/generated/formal/frame01.png", "objectKey": "generated/formal/frame01.png", "assetObjectId": "asset-object-frame01", "width": 192, "height": 256 },
+            { "imageSrc": "/generated/formal/frame02.png", "objectKey": "generated/formal/frame02.png", "assetObjectId": "asset-object-frame02", "width": 192, "height": 256 }
         ]);
         let record = EditorProjectResourceRecord {
             resource_id: "editor-resource-action".to_string(),
@@ -10889,11 +10925,15 @@ mod tests {
         let formal_frames = json!([
             {
                 "imageSrc": "/generated/formal/frame-0001.png",
+                "objectKey": "generated/formal/frame-0001.png",
+                "assetObjectId": "asset-object-frame-0001",
                 "width": 192,
                 "height": 256
             },
             {
                 "imageSrc": "/generated/formal/frame-0002.png",
+                "objectKey": "generated/formal/frame-0002.png",
+                "assetObjectId": "asset-object-frame-0002",
                 "width": 192,
                 "height": 256
             }
@@ -10940,8 +10980,8 @@ mod tests {
     #[test]
     fn editor_showcase_payload_does_not_backfill_missing_formal_sequence_fields() {
         let formal_frames = json!([
-            { "imageSrc": "/generated/formal/frame-0001.png", "width": 192, "height": 256 },
-            { "imageSrc": "/generated/formal/frame-0002.png", "width": 192, "height": 256 }
+            { "imageSrc": "/generated/formal/frame-0001.png", "objectKey": "generated/formal/frame-0001.png", "assetObjectId": "asset-object-frame-0001", "width": 192, "height": 256 },
+            { "imageSrc": "/generated/formal/frame-0002.png", "objectKey": "generated/formal/frame-0002.png", "assetObjectId": "asset-object-frame-0002", "width": 192, "height": 256 }
         ]);
         let legacy_generation_inputs = json!({
             "fields": [{ "title": "动作", "value": "待机" }],
diff --git a/server-rs/crates/api-server/src/external_editor_api.rs b/server-rs/crates/api-server/src/external_editor_api.rs
index 10baecb1f..e70f33908 100644
--- a/server-rs/crates/api-server/src/external_editor_api.rs
+++ b/server-rs/crates/api-server/src/external_editor_api.rs
@@ -488,9 +488,8 @@ pub async fn create_external_editor_asset(
         payload.asset_kind.as_deref(),
         payload.generation_inputs.clone(),
     )?;
-    let image_sequence_frames_json = crate::editor_project::serialize_editor_image_sequence_frames(
-        payload.image_sequence_frames,
-    )?;
+    let image_sequence_frames_json =
+        serialize_external_editor_image_sequence_frames(payload.image_sequence_frames)?;
     let object_key = normalize_optional_string(payload.object_key);
     let image_src = normalize_editor_persisted_media_src(payload.image_src, object_key.as_deref())?;
     let asset = state
@@ -597,9 +596,8 @@ pub async fn create_external_editor_project_resource(
         payload.asset_kind.as_deref(),
         payload.generation_inputs.clone(),
     )?;
-    let image_sequence_frames_json = crate::editor_project::serialize_editor_image_sequence_frames(
-        payload.image_sequence_frames,
-    )?;
+    let image_sequence_frames_json =
+        serialize_external_editor_image_sequence_frames(payload.image_sequence_frames)?;
     let object_key = normalize_optional_string(payload.object_key);
     let image_src = normalize_editor_persisted_media_src(payload.image_src, object_key.as_deref())?;
     let resource = state
@@ -1017,6 +1015,12 @@ fn serialize_external_editor_generation_inputs(
     )
 }
 
+fn serialize_external_editor_image_sequence_frames(
+    frames: Option<Value>,
+) -> Result<Option<String>, AppError> {
+    crate::editor_project::serialize_editor_image_sequence_frames(frames)
+}
+
 #[cfg(test)]
 mod tests {
     use super::*;
@@ -1140,6 +1144,63 @@ mod tests {
         }
     }
 
+    #[test]
+    fn external_editor_sequence_frames_reject_temporary_signed_urls_without_stable_references() {
+        let error = serialize_external_editor_image_sequence_frames(Some(json!([
+            {
+                "imageSrc": "https://example.invalid/frame-01.png?Expires=60&Signature=temporary-1",
+                "width": 192,
+                "height": 256
+            },
+            {
+                "imageSrc": "https://example.invalid/frame-02.png?Expires=60&Signature=temporary-2",
+                "width": 192,
+                "height": 256
+            }
+        ])))
+        .expect_err("External v1 不能把仅含临时签名 URL 的帧持久化为正式动作");
+
+        assert_eq!(error.status_code(), StatusCode::BAD_REQUEST);
+        assert_eq!(
+            error.details().and_then(|details| details.get("fields")),
+            Some(&json!(["objectKey", "assetObjectId"]))
+        );
+        assert!(error.body_text().contains("临时签名 URL"));
+    }
+
+    #[test]
+    fn external_editor_sequence_frames_derive_persistent_paths_from_object_keys() {
+        let serialized = serialize_external_editor_image_sequence_frames(Some(json!([
+            {
+                "imageSrc": "https://example.invalid/frame-01.png?Expires=60&Signature=temporary-1",
+                "objectKey": "/generated/action/frame-01.png",
+                "assetObjectId": "asset-object-frame-01",
+                "width": 192,
+                "height": 256
+            },
+            {
+                "imageSrc": "https://example.invalid/frame-02.png?Expires=60&Signature=temporary-2",
+                "objectKey": "generated/action/frame-02.png",
+                "assetObjectId": "asset-object-frame-02",
+                "width": 192,
+                "height": 256
+            }
+        ])))
+        .expect("带稳定对象引用的 External v1 正式帧应可持久化")
+        .expect("正式帧序列应产生 JSON");
+        let frames: Value = serde_json::from_str(&serialized).expect("正式帧序列应为合法 JSON");
+
+        assert_eq!(frames[0]["imageSrc"], "/generated/action/frame-01.png");
+        assert_eq!(frames[1]["imageSrc"], "/generated/action/frame-02.png");
+        assert!(frames.as_array().is_some_and(|frames| {
+            frames.iter().all(|frame| {
+                !frame["imageSrc"]
+                    .as_str()
+                    .is_some_and(|image_src| image_src.contains("Signature="))
+            })
+        }));
+    }
+
     #[test]
     fn external_generation_requires_bounded_printable_idempotency_key() {
         let missing = HeaderMap::new();
@@ -1268,6 +1329,24 @@ mod tests {
                 json!(2),
                 "{request_schema_name}"
             );
+            let frame_schema = &parsed["components"]["schemas"]["EditorImageSequenceFrame"];
+            assert_eq!(
+                frame_schema["required"],
+                json!(["imageSrc", "objectKey", "assetObjectId", "width", "height"]),
+                "{request_schema_name}"
+            );
+            for stable_field in ["objectKey", "assetObjectId"] {
+                assert_eq!(
+                    frame_schema["properties"][stable_field]["type"],
+                    json!("string"),
+                    "{request_schema_name}.{stable_field}"
+                );
+                assert_eq!(
+                    frame_schema["properties"][stable_field]["minLength"],
+                    json!(1),
+                    "{request_schema_name}.{stable_field}"
+                );
+            }
             assert_eq!(
                 request_schema["properties"]["imageSequenceDurationMs"]["minimum"],
                 json!(1),
diff --git a/server-rs/crates/api-server/src/external_generation_worker.rs b/server-rs/crates/api-server/src/external_generation_worker.rs
index 73097118e..04ef53ec6 100644
--- a/server-rs/crates/api-server/src/external_generation_worker.rs
+++ b/server-rs/crates/api-server/src/external_generation_worker.rs
@@ -1392,7 +1392,7 @@ fn compact_external_api_generation_result(result: Value) -> Value {
             frame.retain(|key, _| {
                 matches!(
                     key.as_str(),
-                    "frameIndex" | "imageSrc" | "objectKey" | "width" | "height"
+                    "frameIndex" | "imageSrc" | "objectKey" | "assetObjectId" | "width" | "height"
                 )
             });
             remove_unstable_external_generation_media_fields(frame);
@@ -2291,6 +2291,23 @@ mod tests {
                     "height": 1024,
                     "generationInputs": {"private": true}
                 },
+                "frames": [
+                    {
+                        "imageSrc": "/generated/action/frame-01.png",
+                        "objectKey": "generated/action/frame-01.png",
+                        "assetObjectId": "asset-object-frame-01",
+                        "width": 192,
+                        "height": 256,
+                        "provider": "internal-provider-must-not-persist"
+                    },
+                    {
+                        "imageSrc": "/generated/action/frame-02.png",
+                        "objectKey": "generated/action/frame-02.png",
+                        "assetObjectId": "asset-object-frame-02",
+                        "width": 192,
+                        "height": 256
+                    }
+                ],
                 "project": {
                     "projectId": "project-1",
                     "canvas": {"layers": ["large-layout-must-not-persist"]}
@@ -2347,6 +2364,16 @@ mod tests {
         );
         assert!(result["asset"].get("thumbnailSrc").is_none());
         assert!(result["asset"].get("generationInputs").is_none());
+        assert_eq!(
+            result["frames"][0],
+            json!({
+                "imageSrc": "/generated/action/frame-01.png",
+                "objectKey": "generated/action/frame-01.png",
+                "assetObjectId": "asset-object-frame-01",
+                "width": 192,
+                "height": 256
+            })
+        );
         assert_eq!(
             result["warning"],
             json!({