I got in touch with my hosting service provider to buy a dedicated IP address. Once I made the payment, I verified the address using specialized services. These services provided a list of websites that are linked to the IP, which varied with some websites appearing more than once. I'm unsure whether I have been given a "clean" IP or if it's being shared with someone else.
How can I confirm this, and should I trust my provider or the IP check services?

Would you like to obtain an IP that hasn't been used before?
but, I doubt such IPs exist anymore. The key aspect is to ensure that your IP isn't included in the "black" IP lists of relevant monitoring agencies due to spam being sent out from it, mainly through email.

We take the console, take any address from the list of strangers, write ping other_site.com and look at what ip this site is. If it is dedicated to you, then ask questions to your provider.
What is important is not how many domains were linked, but how many remain.

Thanks, I have taken your advice.
I did share an IP with the rest. The provider could not find a reasonable solution.
Took the address from another operator.

To confirm whether your dedicated IP address is clean or shared, there are a few steps you can take. Firstly, you should contact your hosting service provider and inquire about the specifics of the IP address you purchased. They should be able to provide you with information regarding the cleanliness of the IP and whether it is shared with other websites.
Additionally, you can perform your own investigation by checking the IP address against various blacklists and reputation databases. Services such as Spamhaus and Barracuda offer IP reputation checks that can give you insight into whether the IP address has been flagged for suspicious activity or spamming.

When it comes to trust, it's important to consider both your hosting provider and the IP check services. Your hosting provider should have the most accurate and up-to-date information about the IP addresses they allocate. However, it's also beneficial to utilize independent IP check services to verify the information provided by your provider.

Multiple websites could be hosted on the same physical machine with the same IP addresses. Sometimes there can be 100s of websites using the same IP address. Previously, having a shared IP used to mean shared hosting.