diff --git a/examples/openthread/ot_br/main/esp_ot_br.c b/examples/openthread/ot_br/main/esp_ot_br.c
index beae87aa9e..32a5535658 100644
--- a/examples/openthread/ot_br/main/esp_ot_br.c
+++ b/examples/openthread/ot_br/main/esp_ot_br.c
@@ -1,10 +1,15 @@
-/* OpenThread Border Router Example
-
-   This example code is in the Public Domain (or CC0 licensed, at your option.)
-
-   Unless required by applicable law or agreed to in writing, this
-   software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
-   CONDITIONS OF ANY KIND, either express or implied.
+/*
+ * SPDX-FileCopyrightText: 2021 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: CC0
+ *
+ * OpenThread Border Router Example
+ *
+ * This example code is in the Public Domain (or CC0 licensed, at your option.)
+ *
+ * Unless required by applicable law or agreed to in writing, this
+ * software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+ * CONDITIONS OF ANY KIND, either express or implied.
 */
 
 #include <stdio.h>
diff --git a/examples/openthread/ot_br/main/esp_ot_config.h b/examples/openthread/ot_br/main/esp_ot_config.h
index 11939eb6e8..8dc1fa2a9d 100644
--- a/examples/openthread/ot_br/main/esp_ot_config.h
+++ b/examples/openthread/ot_br/main/esp_ot_config.h
@@ -1,10 +1,15 @@
-/* OpenThread Border Router Example
-
-   This example code is in the Public Domain (or CC0 licensed, at your option.)
-
-   Unless required by applicable law or agreed to in writing, this
-   software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
-   CONDITIONS OF ANY KIND, either express or implied.
+/*
+ * SPDX-FileCopyrightText: 2021 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: CC0
+ *
+ * OpenThread Border Router Example
+ *
+ * This example code is in the Public Domain (or CC0 licensed, at your option.)
+ *
+ * Unless required by applicable law or agreed to in writing, this
+ * software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+ * CONDITIONS OF ANY KIND, either express or implied.
 */
 
 #pragma once
diff --git a/examples/openthread/ot_cli/main/esp_ot_cli.c b/examples/openthread/ot_cli/main/esp_ot_cli.c
index 7fd86945ec..0d5e321dbe 100644
--- a/examples/openthread/ot_cli/main/esp_ot_cli.c
+++ b/examples/openthread/ot_cli/main/esp_ot_cli.c
@@ -1,10 +1,15 @@
-/* OpenThread Command Line Example
-
-   This example code is in the Public Domain (or CC0 licensed, at your option.)
-
-   Unless required by applicable law or agreed to in writing, this
-   software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
-   CONDITIONS OF ANY KIND, either express or implied.
+/*
+ * SPDX-FileCopyrightText: 2021 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: CC0
+ *
+ * OpenThread Command Line Example
+ *
+ * This example code is in the Public Domain (or CC0 licensed, at your option.)
+ *
+ * Unless required by applicable law or agreed to in writing, this
+ * software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+ * CONDITIONS OF ANY KIND, either express or implied.
 */
 
 #include <stdio.h>
diff --git a/examples/openthread/ot_cli/main/esp_ot_cli_extension.c b/examples/openthread/ot_cli/main/esp_ot_cli_extension.c
index fb76929d24..f218535851 100644
--- a/examples/openthread/ot_cli/main/esp_ot_cli_extension.c
+++ b/examples/openthread/ot_cli/main/esp_ot_cli_extension.c
@@ -1,10 +1,15 @@
-/* OpenThread Command Line Example
-
-   This example code is in the Public Domain (or CC0 licensed, at your option.)
-
-   Unless required by applicable law or agreed to in writing, this
-   software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
-   CONDITIONS OF ANY KIND, either express or implied.
+/*
+ * SPDX-FileCopyrightText: 2021 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: CC0
+ *
+ * OpenThread Command Line Example
+ *
+ * This example code is in the Public Domain (or CC0 licensed, at your option.)
+ *
+ * Unless required by applicable law or agreed to in writing, this
+ * software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+ * CONDITIONS OF ANY KIND, either express or implied.
 */
 
 #include "esp_openthread.h"
diff --git a/examples/openthread/ot_cli/main/esp_ot_cli_extension.h b/examples/openthread/ot_cli/main/esp_ot_cli_extension.h
index ce90a0d39f..0fd1c2c511 100644
--- a/examples/openthread/ot_cli/main/esp_ot_cli_extension.h
+++ b/examples/openthread/ot_cli/main/esp_ot_cli_extension.h
@@ -1,10 +1,15 @@
-/* OpenThread Command Line Example
-
-   This example code is in the Public Domain (or CC0 licensed, at your option.)
-
-   Unless required by applicable law or agreed to in writing, this
-   software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
-   CONDITIONS OF ANY KIND, either express or implied.
+/*
+ * SPDX-FileCopyrightText: 2021 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: CC0
+ *
+ * OpenThread Command Line Example
+ *
+ * This example code is in the Public Domain (or CC0 licensed, at your option.)
+ *
+ * Unless required by applicable law or agreed to in writing, this
+ * software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+ * CONDITIONS OF ANY KIND, either express or implied.
 */
 
 #pragma once
diff --git a/examples/openthread/ot_cli/main/esp_ot_config.h b/examples/openthread/ot_cli/main/esp_ot_config.h
index 3c33efc850..8506eed20d 100644
--- a/examples/openthread/ot_cli/main/esp_ot_config.h
+++ b/examples/openthread/ot_cli/main/esp_ot_config.h
@@ -1,10 +1,15 @@
-/* OpenThread Command Line Example
-
-   This example code is in the Public Domain (or CC0 licensed, at your option.)
-
-   Unless required by applicable law or agreed to in writing, this
-   software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
-   CONDITIONS OF ANY KIND, either express or implied.
+/*
+ * SPDX-FileCopyrightText: 2021 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: CC0
+ *
+ * OpenThread Command Line Example
+ *
+ * This example code is in the Public Domain (or CC0 licensed, at your option.)
+ *
+ * Unless required by applicable law or agreed to in writing, this
+ * software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+ * CONDITIONS OF ANY KIND, either express or implied.
 */
 
 #pragma once
diff --git a/examples/openthread/ot_cli/main/esp_ot_iperf.c b/examples/openthread/ot_cli/main/esp_ot_iperf.c
index 9a9d09ae7a..2543379dcc 100644
--- a/examples/openthread/ot_cli/main/esp_ot_iperf.c
+++ b/examples/openthread/ot_cli/main/esp_ot_iperf.c
@@ -1,10 +1,15 @@
-/* OpenThread Command Line Example
-
-   This example code is in the Public Domain (or CC0 licensed, at your option.)
-
-   Unless required by applicable law or agreed to in writing, this
-   software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
-   CONDITIONS OF ANY KIND, either express or implied.
+/*
+ * SPDX-FileCopyrightText: 2021 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: CC0
+ *
+ * OpenThread Command Line Example
+ *
+ * This example code is in the Public Domain (or CC0 licensed, at your option.)
+ *
+ * Unless required by applicable law or agreed to in writing, this
+ * software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+ * CONDITIONS OF ANY KIND, either express or implied.
 */
 
 #include "esp_check.h"
@@ -17,6 +22,7 @@
 #include <string.h>
 
 #define TAG "ot-iperf"
+static char s_dest_ip6_addr[50];
 
 void esp_ot_process_iperf(void *aContext, uint8_t aArgsLength, char *aArgs[])
 {
@@ -48,7 +54,8 @@ void esp_ot_process_iperf(void *aContext, uint8_t aArgsLength, char *aArgs[])
                 IPERF_FLAG_SET(cfg.flag, IPERF_FLAG_CLIENT);
                 IPERF_FLAG_CLR(cfg.flag, IPERF_FLAG_SERVER);
                 i++;
-                cfg.destination_ip6 = aArgs[i];
+                strcpy(s_dest_ip6_addr, aArgs[i]);
+                cfg.destination_ip6 = s_dest_ip6_addr;
                 otCliOutputFormat("ip:%s\n", cfg.destination_ip6);
             } else if (strcmp(aArgs[i], "-s") == 0) {
                 IPERF_FLAG_SET(cfg.flag, IPERF_FLAG_SERVER);
diff --git a/examples/openthread/ot_cli/main/esp_ot_iperf.h b/examples/openthread/ot_cli/main/esp_ot_iperf.h
index e11e4d11d2..82cedf091b 100644
--- a/examples/openthread/ot_cli/main/esp_ot_iperf.h
+++ b/examples/openthread/ot_cli/main/esp_ot_iperf.h
@@ -1,10 +1,15 @@
-/* OpenThread Command Line Example
-
-   This example code is in the Public Domain (or CC0 licensed, at your option.)
-
-   Unless required by applicable law or agreed to in writing, this
-   software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
-   CONDITIONS OF ANY KIND, either express or implied.
+/*
+ * SPDX-FileCopyrightText: 2021 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: CC0
+ *
+ * OpenThread Command Line Example
+ *
+ * This example code is in the Public Domain (or CC0 licensed, at your option.)
+ *
+ * Unless required by applicable law or agreed to in writing, this
+ * software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+ * CONDITIONS OF ANY KIND, either express or implied.
 */
 
 #pragma once
diff --git a/examples/openthread/ot_cli/main/esp_ot_tcp_socket.c b/examples/openthread/ot_cli/main/esp_ot_tcp_socket.c
index 845f1d29a0..a07b92eaa2 100644
--- a/examples/openthread/ot_cli/main/esp_ot_tcp_socket.c
+++ b/examples/openthread/ot_cli/main/esp_ot_tcp_socket.c
@@ -1,10 +1,15 @@
-/* OpenThread Command Line Example
-
-   This example code is in the Public Domain (or CC0 licensed, at your option.)
-
-   Unless required by applicable law or agreed to in writing, this
-   software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
-   CONDITIONS OF ANY KIND, either express or implied.
+/*
+ * SPDX-FileCopyrightText: 2021 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: CC0
+ *
+ * OpenThread Command Line Example
+ *
+ * This example code is in the Public Domain (or CC0 licensed, at your option.)
+ *
+ * Unless required by applicable law or agreed to in writing, this
+ * software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+ * CONDITIONS OF ANY KIND, either express or implied.
 */
 
 #include "esp_check.h"
diff --git a/examples/openthread/ot_cli/main/esp_ot_tcp_socket.h b/examples/openthread/ot_cli/main/esp_ot_tcp_socket.h
index 66101a5d11..c5f7e50226 100644
--- a/examples/openthread/ot_cli/main/esp_ot_tcp_socket.h
+++ b/examples/openthread/ot_cli/main/esp_ot_tcp_socket.h
@@ -1,10 +1,15 @@
-/* OpenThread Command Line Example
-
-   This example code is in the Public Domain (or CC0 licensed, at your option.)
-
-   Unless required by applicable law or agreed to in writing, this
-   software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
-   CONDITIONS OF ANY KIND, either express or implied.
+/*
+ * SPDX-FileCopyrightText: 2021 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: CC0
+ *
+ * OpenThread Command Line Example
+ *
+ * This example code is in the Public Domain (or CC0 licensed, at your option.)
+ *
+ * Unless required by applicable law or agreed to in writing, this
+ * software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+ * CONDITIONS OF ANY KIND, either express or implied.
 */
 
 #pragma once
diff --git a/examples/openthread/ot_cli/main/esp_ot_udp_socket.c b/examples/openthread/ot_cli/main/esp_ot_udp_socket.c
index e3f5727e7d..39b167f817 100644
--- a/examples/openthread/ot_cli/main/esp_ot_udp_socket.c
+++ b/examples/openthread/ot_cli/main/esp_ot_udp_socket.c
@@ -1,10 +1,15 @@
-/* OpenThread Command Line Example
-
-   This example code is in the Public Domain (or CC0 licensed, at your option.)
-
-   Unless required by applicable law or agreed to in writing, this
-   software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
-   CONDITIONS OF ANY KIND, either express or implied.
+/*
+ * SPDX-FileCopyrightText: 2021 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: CC0
+ *
+ * OpenThread Command Line Example
+ *
+ * This example code is in the Public Domain (or CC0 licensed, at your option.)
+ *
+ * Unless required by applicable law or agreed to in writing, this
+ * software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+ * CONDITIONS OF ANY KIND, either express or implied.
 */
 
 #include "esp_check.h"
diff --git a/examples/openthread/ot_cli/main/esp_ot_udp_socket.h b/examples/openthread/ot_cli/main/esp_ot_udp_socket.h
index 531b6be09e..97f9945dfd 100644
--- a/examples/openthread/ot_cli/main/esp_ot_udp_socket.h
+++ b/examples/openthread/ot_cli/main/esp_ot_udp_socket.h
@@ -1,10 +1,15 @@
-/* OpenThread Command Line Example
-
-   This example code is in the Public Domain (or CC0 licensed, at your option.)
-
-   Unless required by applicable law or agreed to in writing, this
-   software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
-   CONDITIONS OF ANY KIND, either express or implied.
+/*
+ * SPDX-FileCopyrightText: 2021 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: CC0
+ *
+ * OpenThread Command Line Example
+ *
+ * This example code is in the Public Domain (or CC0 licensed, at your option.)
+ *
+ * Unless required by applicable law or agreed to in writing, this
+ * software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+ * CONDITIONS OF ANY KIND, either express or implied.
 */
 
 #pragma once
diff --git a/examples/openthread/ot_rcp/main/esp_ot_config.h b/examples/openthread/ot_rcp/main/esp_ot_config.h
index 615f867a3c..65a9291115 100644
--- a/examples/openthread/ot_rcp/main/esp_ot_config.h
+++ b/examples/openthread/ot_rcp/main/esp_ot_config.h
@@ -1,10 +1,15 @@
-/* OpenThread RCP Example
-
-   This example code is in the Public Domain (or CC0 licensed, at your option.)
-
-   Unless required by applicable law or agreed to in writing, this
-   software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
-   CONDITIONS OF ANY KIND, either express or implied.
+/*
+ * SPDX-FileCopyrightText: 2021 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: CC0
+ *
+ * OpenThread Radio Co-Processor (RCP) Example
+ *
+ * This example code is in the Public Domain (or CC0 licensed, at your option.)
+ *
+ * Unless required by applicable law or agreed to in writing, this
+ * software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+ * CONDITIONS OF ANY KIND, either express or implied.
 */
 
 #pragma once
diff --git a/examples/openthread/ot_rcp/main/esp_ot_rcp.c b/examples/openthread/ot_rcp/main/esp_ot_rcp.c
index eb14ea9dea..5e62d439d4 100644
--- a/examples/openthread/ot_rcp/main/esp_ot_rcp.c
+++ b/examples/openthread/ot_rcp/main/esp_ot_rcp.c
@@ -1,10 +1,15 @@
-/* OpenThread RCP Example
-
-   This example code is in the Public Domain (or CC0 licensed, at your option.)
-
-   Unless required by applicable law or agreed to in writing, this
-   software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
-   CONDITIONS OF ANY KIND, either express or implied.
+/*
+ * SPDX-FileCopyrightText: 2021 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: CC0
+ *
+ * OpenThread Radio Co-Processor (RCP) Example
+ *
+ * This example code is in the Public Domain (or CC0 licensed, at your option.)
+ *
+ * Unless required by applicable law or agreed to in writing, this
+ * software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+ * CONDITIONS OF ANY KIND, either express or implied.
 */
 
 #include <stdio.h>
diff --git a/tools/ci/check_copyright_ignore.txt b/tools/ci/check_copyright_ignore.txt
index 8021d424db..037799cda7 100644
--- a/tools/ci/check_copyright_ignore.txt
+++ b/tools/ci/check_copyright_ignore.txt
@@ -3216,12 +3216,6 @@ examples/network/simple_sniffer/components/pcap/pcap.h
 examples/network/simple_sniffer/main/cmd_sniffer.c
 examples/network/simple_sniffer/main/cmd_sniffer.h
 examples/network/simple_sniffer/main/simple_sniffer_example_main.c
-examples/openthread/ot_br/main/esp_ot_br.c
-examples/openthread/ot_br/main/esp_ot_config.h
-examples/openthread/ot_cli/main/esp_ot_cli.c
-examples/openthread/ot_cli/main/esp_ot_config.h
-examples/openthread/ot_rcp/main/esp_ot_config.h
-examples/openthread/ot_rcp/main/esp_ot_rcp.c
 examples/peripherals/adc/esp32c3/adc/main/adc_dma_example_main.c
 examples/peripherals/adc/single_read/adc/main/adc1_example_main.c
 examples/peripherals/adc/single_read/adc2/main/adc2_example_main.c