in arin-land, i think they actually ask to see proof of dual-homing before issuing the asn.but you want to TEST that it is actually deployed.what is not clear to me is HOW to do that.please take into account the problem of bgp best-path-only propagation. I do the same in RIPEland as well. BGP best-path-only does put a crimp in the works which is why one needs to check a few public route servers. I cycle thru all multihomers (that I have allocated) every few months and check 3-4 large route servers or LGs and see who doesn't show up at all (went bellyup) or has only 1 path (dropped the 2nd due to economic downturn).
expecting an ec-style bureaucracy (<g>) to do something like that seems unreasonable. what if one link is down for a day or a week (should a metric week have ten days?:-)? i suspect this is among the reasons the rirs use more administrative tests. all in all, it's a pain. randy