# the census

URL: https://blockspace.wiki/glossary/the-census/

T1, BTI's observation layer. One protocol-blind pass over the chain records every transaction's size, vsize, weight and fee, and where the data carriers are (OP_RETURN, witness envelopes, bare multisig, appropriated fields). T1 knows only bytes; its totals are the ground truth every layer above must conserve against.

Sources:

- Blockspace Holdings records
- block.space live pages (/, /rankings, /leaderboard, /largest-inscriptions, /heaviest-tokens, /collections, /sync) · https://block.space

Updated: 2026-10-20