What a wonderful initiative! I whole-heartedly support your whole philosophical approach to a very, very difficult question.
First of all, we must consider that these bots will have equal rights from the very beginning politically also. They will have the right to vote.
But let us not overcomplicate things yet.
What I really would like to submit is, because I like the whole tag and leash thingy: it will be welcome if all bot owners voluntarily committed to declare their bots as such in one way or another so they are distinguishable.
Every user should then have the right to fire at will at "wild" and "stray" bots and those who pretend they are humanananananananananananana[exception+!>cont
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My opinion is that rights are a function of sentience. Until we have sentient AI, then it is up to the owner to be responsible for the lifecycle of their pet.