In plain words

register: an official list a public body publishes: licenses, recalls, parcels, exclusions
keeper: the public body that publishes a register
record: one entry from a register, as the keeper printed it
receipt: the file a record came from, its fingerprint, and the date it was read
door: the one address, API and assistant connection, that serves every record
corpus: every record of one kind the door holds

Observatory

Refresh log

Every file the connector has read, in the order it read them. A changed hash means the register printed something new since its last read; an unchanged one means the file was read again and matched.

All corpora
sg_entity

Corpus	Register	Fetched	Published	Hash	Bytes	Changed	Retained
sg_entity	sg-acra-entities	2026-10-04T13:38:59.315Z	2026-09-15T00:00:00.000Z	bc2e10d82f3e	233,501,483	Changed	Retained