I find it funny how when you want a bulletproof registrar people respond with registrars based in the USA...
)
You should try offshore registrars.
Katzglobal.com - Singapore, they don't keep
any whois data since they don't even ask for your address.
Nic.ru - Russia
vunic.vu - Vanuatu
Internet.bs - bahamas, it's a good reliable provider, unsure whether they'd be happy about ignoring dmcas tho.
The best option is to buy a country gTLD such as .md, .ru, .ph, .nu etc.
Make sure the registrar isn't based in the USA and also make sure the server ip isn't located in the USA and then you will be safe pretty much. (example, tonic.to is a tonga registrar BUT it's located and based in the USA therefore they can take it down).