You forgot to call the conversion function for some parameter in your function.
I tested and corrected your code, call it this way:
is_verified = verified(
convert(data['k_signer']),
data['d_pk'],
convert(data['d_signer']),
data['sig'],
convert(data['addr']),
convert(data['seed']),
convert(data['data'])
)
solved How can i fix concatenate tuple (not “list”) to tuple