Run hcidump in background mode and then run the "scanner"
$ sudo hcidump -i hci0 -w dump &
By the -i option Bluetooth device is specified and by the -w option the output file is specified.
When "scanner" finish, kill the background hcidump and then open "dump" file with wireshark program:
The selected packet is a description of the device find by the scanner (as we can see from the fields "BD_ADDR" and "Class of Device" it is a Nokia mobile phone).