# AI–Blockchain Project-Card Dataset (v1.0.0)

A curated corpus of **845 AI–blockchain project cards** with a machine-readable data contract.

## Contents

| File | Description |
|---|---|
| `project_cards.json` | All 845 records in a single JSON array |
| `project_card.schema.json` | JSON Schema (draft 2020-12) for validation |
| `cards/` | Individual JSON files (one per project card) |

## Schema

Each record conforms to the JSON Schema and contains three components:

- **Passport**: normalized metadata (Category, chain, type, token_type, ai_component, use_case)
- **Links**: canonical URLs (website, documentation, repository, social channels)
- **Evidence**: structured entries linking passport claims to tiered source artifacts (Tier-1/2/3)

## Key Statistics

- **N = 845** project cards
- **4,353** evidence entries (mean 5.2 per card)
- Field-level missingness: token_type 43.4%, ai_component 22.4%, use_case 9.0%

## License

CC-BY 4.0 International

## Citation

If you use this dataset, please cite the accompanying Data Descriptor:

> Kadochnikov, N. N. (2026). A Project-Card Schema and Completeness Diagnostics for AI–Blockchain Registries. *Scientific Data* (submitted).

## Contact

Nikita N. Kadochnikov — redice.surgut@gmail.com — ORCID: 0009-0004-5996-7934