# What is a collection on block.space?

A set of NFTs with a membership source (chain, index or asserted), ranked by blockspace.

URL: https://blockspace.wiki/answers/what-is-a-collection-on-block-space/

A collection on block.space is a set of NFTs with a membership source, its provenance: chain (written on Bitcoin, such as parent inscriptions), index (a protocol's own index) or asserted (a published list, such as the Degent Club list). block.space/collections ranks them by blockspace, by [Book A](https://blockspace.wiki/glossary/book-a/) by default. Fungible tokens are left out.

Sources:

- block.space: the largest NFT collections on Bitcoin, by blockspace · https://block.space/collections
- block.space collections API · https://block.space/api/collections
- Blockspace Holdings records

Updated: 2026-10-20