BCID — Building Culture Identity
One-page overview · v1 draft · Lite paper · RFC
What is BCID?
Building Culture Identity (BCID) is a soulbound, portable identity standard for builders, DAOs, and agents. It complements ENS (names), EAS (attestations), World ID (human proof), and ERC-8004 (agent registry) — it does not replace them.
DID format: did:bcid:human:{id} · did:bcid:company:{id} · did:bcid:asset:{id} · did:bcid:agent:{id}
Live today: app.buildingcultureid.space/bcid · bridge from .culture · grant verifier at /grant-proof
Problem
| Pain | Who feels it |
|---|---|
| Credentials are not portable across platforms | Builders, freelancers |
| Wallet address ≠ human-readable trust signal | All Web3 users |
| Sybil attacks undermine grants and DAO programs | Protocol operators |
| No standard for accountable AI agent identity | Agent developers |
| Reputation rewards followers, not shipped work | Builders |
Solution — dynamic soulbound identity
The identity anchor is non-transferable (soulbound). Reputation and credentials evolve — Builder, Trust, Contribution, and Verification scores update as you ship; credentials can be issued or revoked.
| Layer | BCID approach |
|---|---|
| Identity | Soulbound ERC-721 in BcidRegistry on Base |
| Credentials | Soulbound catalog + optional EAS attestations on Base |
| Reputation | Four verifiable scores (off-chain compute, on-chain anchors) |
| Recovery | 2-of-3 guardian timelock (72h delay) |
| Privacy | Encrypted credential storage; ZK selective disclosure (roadmap) |
| Interop | .culture bridge, ENS link, Farcaster FID, World ID, ERC-8004 agent card |
Four BCID types
| Type | Namespace | Primary use |
|---|---|---|
| Human | did:bcid:human:* | Individual identity, credentials, reputation |
| Company | did:bcid:company:* | Org identity, delegated admins |
| Asset | did:bcid:asset:* | Tokenized property, certs, RWAs |
| Agent | did:bcid:agent:* | AI agent wallet, reputation, revenue split |
Why not ENS / Farcaster / EAS alone?
- ENS — great namespace, transferable, no native reputation or credentials
- Farcaster — social graph, not portable credential wallet
- EAS — schema-agnostic attestations, no identity namespace or dynamic scores
- World ID — human uniqueness, not builder reputation
- BCID — soulbound DID + dynamic scores + credential catalog + agent-native ownership
See competitor analysis for the full matrix.
Integrate BCID (DAOs & protocols)
Free pilot package for 3–5 DAOs:
- BCID mint for core contributors (or bridge from
.culture) - Credential types:
dao-member,grant-applicant,bcid-builder - Public leaderboard at /bcid/leaderboard
- Feedback shapes RFC v1.1 via /voice
APIs: GET /api/bcid/resolve · POST /api/bcid/bridge/culture · GET /api/bcid/catalog · GET /api/bcid/scores
Partnership brief: DAO_PARTNERSHIP_BRIEF.md
Contact: hello@buildingcultureid.space · Grant proof
Roadmap (v1)
| Phase | Deliverable |
|---|---|
| Now | Human BCID mint, .culture bridge, 6+ credential types, leaderboard |
| Month 1–2 | BCID Spec RFC public comment; EAS schema pack on Base Sepolia |
| Month 2–3 | 100 Human BCIDs on Base mainnet; 3 DAO pilots |
| Month 4+ | Company/Asset BCID; ZK selective disclosure; W3C DID method doc |
Standards path
BCID does not claim to be the global standard on day one. Path: public spec → RFC feedback → pilot DAOs → EAS schema registry → ecosystem co-publication.
We cite and interoperate with EAS, ENS, World ID, and ERC-8004 in all external materials.
Give feedback: /voice · GitHub Discussions · RFC comment deadline in BCID_SPEC_RFC.md