A pedigree dog has a chip number written on its certificate, as long as the dog has a certificate, it has a chip implanted in the body, you can take a special card reader, put it near the dog chip implant, it will show the chip number in the card reader, and then compare with the certificate to know.
If the comparison is consistent, then log in to the relevant certification body from the Internet, enter the chip number you just got, if the chip number is correct, it will display the dog's information, not correct naturally is false.