Get Properties of storage blobs returning empty dict

I've just uploaded a 5GB of data and would like to verify that the MD5 sums match. I've calculated this for my local copy of the files, but am having problems fetching ContentMD5 from Azure. So far, I get an empty dict, but I can see the blob names. I've limited it to the first 10 items at the moment, just for debugging. I'm aware that MD5 is different on Azure from a typical md5sum call and have allowed for that locally. But, currently, I cannot see any blob properties. The properties are there when I browse via the Azure console (as is the ContentMD5 property).

Where am I going wrong?

Here's my code at the moment:

import os
from os import sys
from azure.storage.blob import BlobServiceClient

def remote_check(connection_str):
    blob_service_client = BlobServiceClient.from_connection_string(connection_str)
    container_name = "global"
    container = blob_service_client.get_container_client(container=container_name)
    blob_list = container.list_blobs()
    count = 0
    for blob in blob_list:
        if count < 10:
            blob_client = blob_service_client.get_blob_client(container=container_name, blob=blob)
            a = blob_client.get_blob_properties()
            print(a.metadata)
            print("Blob name: " + str(blob_client.blob_name))
            count = count + 1
        else:
           break

def main():
    try:
        CONNECTION_STRING = os.environ['AZURE_STORAGE_CONNECTION_STRING']
        remote_check(CONNECTION_STRING)
    except KeyError:
        print("AZURE_STORAGE_CONNECTION_STRING must be set.")
        sys.exit(1)

if __name__ == '__main__':
    main()