You can invoke CCPA (if applicable) and directly ask a covered business or registered data broker for an exact output of your existing information on their systems. This is honestly rare and most companies will find ways to deny you - asking for various documents to prove your identity and hoping you quit responding.
If you are a CA resident you can also get on the state's DROP platform to request that all registered data brokers delete your data, but it's only for deletion and not the other 4 types of data requests allowed under the CCPA (right to know, right to collect, right to opt out, and right to limit use).
alt Hacker News
You can invoke CCPA (if applicable) and directly ask a covered business or registered data broker for an exact output of your existing information on their systems. This is honestly rare and most companies will find ways to deny you - asking for various documents to prove your identity and hoping you quit responding.
If you are a CA resident you can also get on the state's DROP platform to request that all registered data brokers delete your data, but it's only for deletion and not the other 4 types of data requests allowed under the CCPA (right to know, right to collect, right to opt out, and right to limit use).