scraper.sh

#!/usr/bin/env bash

while read url; do
    echo "$url"
    re="soundcloud://users:([0-9]+)"
    responseText=$(curl "$url" | grep soundcloud://users:)

    if [[ $responseText =~ $re ]]; then
        echo ${BASH_REMATCH[1]};

        printf ${BASH_REMATCH[1]} >> codes.txt
        printf "\n" >> codes.txt
    else
        echo "Not found: $url";
    fi
done < urls.txt