Reading more fields from Device unique ID?..

Hello,

I want to allocate a 8-bytes unique-id to each OTP that I burn, in addition to the MAC address (broadcasting address).
In the Smart Snippets, under OTP Header, there are many fields called "Device unique ID", where the first two are used for the 6 bytes broadcasting address.

How do I read these fields in the program?
In nvds.c I found the code that reads the OTP broadcasting address.

void nvds_read_bdaddr_from_otp()
{
#ifdef BDADDR_FROM_OTP

#ifndef APP_BOOT_FROM_OTP
…/ /无关的代码——在我的编译APP_BOOT_FROM_OTP is defined.
#else
uint8_t *otp_bdaddr = (uint8_t *)0x20000000 + BDADDR_FROM_OTP; //where in OTP header is BDADDR
#endif

memcpy(&dev_bdaddr, otp_bdaddr, sizeof(dev_bdaddr));
SetBits16(CLK_AMBA_REG, OTP_ENABLE, 0); //disable OTP clock
#ifdef SUPPORT_1_8_V
SetBits16(DCDC_CTRL2_REG, DCDC_VBAT3V_LEV, 0x0); ///--Support 1.8V boot
#endif

#endif
}

I can make a simple 8 bytes static array, and add the following line below the memcpy above:

memcpy(my_unique_id, (otp_bdaddr + 8), 8);

Is this the right way to do it?
Is there a different location that I should use to store identifiers for my own customized usage (to support future stacks, etc.)?
I have also seen fields called Customer Specific Fields at 0x47F54.

thanks

alexsunny