just curious, am i receiving someone else dirty coins after the mixing?
There is definitely a possibility that this could happen. But through the use of mixing your coins with chips you are significantly reducing the risk of this happening. There is very little chance anyone can just look at blockchain records and figure out that this chip belonged to you, and is cashed out to x address. There is even less chance of you being accused of using other people's dirty funds when you use chipmixer.
Even if you do find yourself receiving someone else's "dirty" mixed coins, it's not your fault. You can easily prove that your coins were mixed(chips come in regular sizes, makes this easier to prove as well).
In the end, almost all bitcoins can be traced to "dirty" activity. There is really no clean bitcoin if you think about it. If you receive a bitcoin transaction from someone there is probably just as much a probability that the coins are "dirty", and it'll be easier to trace than if you used a mixer.
I agree with most of your post, however, having unconfirmed inputs in a regular size does not prove they were mixed by chipmixer at all... I could easily use some of my unspent outputs in a transaction that generates new outputs with the exact same value as chipmixer's chips...
The proof is the letter chipmixer can give you, signed by them... However, as it has been discussed before, it's not completely sure a judge will allow a signed letter by an anonymous mixer as valid proof.... I know the courts in my country are very bureaucratic and not tech-savvy at all...
True, i guess i've used chipmixer several times myself and the chip values just seem so obvious.
But then again, you'll probably never be called out for receiving someone else's dirty inputs because this kind of stuff happens all the time. It's hard enough to link a pseudo anonymous identifier to a real person(if you take the right precautions), let alone find out the purpose of the transaction on the bitcoin blockchain, especially after you mix your coins.
The main purpose of a mixer is for privacy anyways, so i really don't think you'll encounter any sort of issue with mixing with Chipmixer. You'll have much more risk of getting caught if you use a mixer to buy illegal things than use a mixer and receive dirty coins. Just my opinion.