Lets try to restructure the question at hand.
Instead of asking for proof of a specific action lets look at what did or did not make sense of the situation at hand.
1. How does a child of around 10 years old travel ALONE (as claimed in his book) from Jakarta, Indonesia to Honolulu, Hawaii, through immigration, through customs, with at least one stop and likely plane transfer in Japan in 1970 or 1971?
Answer: He does not. Some adult HAD to have accompanied him. I have a suspicion that has no material backing who that adult is. But it would be safe to say a child does not make that trip completely alone.
2. Who is the legal guardian after January of 1972 when the ‘Grand Family Reunion of December 1971 and early January 1972 is over? Does the supposed biological mother retain guardianship even though she is an Indonesian citizen and returning ‘indefinitely’ to Indonesia without her child? Is the supposed (but regardless, legal) biological father who is merely visiting the island of Hawaii during the time and who is not and never was a US citizen? Is it the grandmother and grandfather who appear to be taking over responsibility for the child going forward since both original parents are foreign citizens and neither is staying in the US and neither has any plans to ever return? Or is it an agency that has responsibility for refugee foreign children?
Answer: it has to be one of the 2 last options. There is no reason the permanent guardian would be a foreign citizen or expat American who, if she is presenting herself as an American citizen while in Hawaii (which she could have) would be violating the law in the country she calls home - Indonesia. Neither ‘parent’ has any specific plans to EVER return to the US. So as of the early 1970s Obama had to be under the guardianship of someone other than either supposed biological and legal parents.
Sven offers the only known explanation to the questions above. If his story is to be rejected then another story is needed to fill the void that would be left if it is not true. Someone or some agency was Obama’s legal guardian after January of 1971 that was not his supposed parents - that has to be accepted as fact. It would seem that of the possibilities Svens story would have at least a 50/50 chance of being correct given the only other viable option would likely be the grandparents. How would that be verified? Likely via medical and school records from 1971 to 1980. Where are those?
The problem with Catholic Social Services is:
Why would an organization from Connecticut get involved with someone coming into the states at a Hawaii (air)port of entry?