A pedigree dog has a chip number written on its certificate, as long as the dog has a certificate, its body is implanted with a chip, you can take a special card reader, put the dog near the 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 from the Internet to the relevant certification body, enter the chip number you just got, if the chip number is correct, it will show your dog's information, incorrect naturally is false.