IRS won a lawsuit against Kraken and is making it dislose
Name (including full name, any pseudonym, or any user ID);
Date of Birth;
Taxpayer Identification Number;
Physical Address;
Telephone Number;
Email Address;
All documents described in Request No. 4 for the period January 1, 2016 through December 31, 2020 except that: a) Kraken shall only be required to produce transaction hash (ID) and blockchain addresses to the extent that information has been or is in the future backfilled into its transaction data; and b) as to Request 4(d), Kraken may produce raw data even though it does not specifically demarcate chainsplitting transactions.
All transactional ledgers responsive to Request No. 5 for the period January 1, 2016 through December 31, 2020.
Kraken wanted to file the information under seal (that it, giving it to IRS but preventing it to become public record). The court denied the motion.
So all the above details will most likely become public information once Kraken Complies.
In other words, if you have used a transparent ledger, it is a good idea to consider 'Five Dollar Wrench attack' into your OPSEC.