http://yggdrasil.acetone.i2p/en:yggdrasil:dns:wyrd
If the domain is new, it is added, if the owner (IPv6 of the node) is the same, it updates DNS -records, if IPv6 != owner, it just ignores the domain. When the domain is added, the node (represented by IPv6) is saved as an owner, and datetime (seen_first) is saved along it.