is this considered secured

step 1: find a clean online pc and download iancoleman html file from github and verify signature and hash
step2 : on clean pc go to bitaddress.org and download the file using github link there and verify the signature
step 3: burn linuxmint on dvd and
step4:  take dvd and both html files on usb to a allways offline pc.
step 4:  run the dvd live session create a private key in  bitaddress
step 5: create 24 word seed in iancoleman and use the private key created in step4 as passphrase.
step6: note down the seed and passpharese.



is there any flaw in the method for making a coldstorage

note : i would have used talis and electrum but i want to make a bip39.