Nostr is Simplification...

1. Identity is Just a Public Key
Nostr uses a public key as the identity—no need for DIDs, DID Documents, or resolution infrastructure.
OpenID for Verifiable Presentations (OID4VP) relies on DIDs, which require resolution, metadata management, and multiple supported key formats.

Simplification: Nostr eliminates the entire DID stack. Identity is direct, portable, and cryptographically verifiable without any external dependencies.

2. Signatures and Proofs Are Built In
Nostr events are inherently signed with the user’s private key. This signature serves as the cryptographic proof.
OID4VP requires more complex formats like SD-JWTs, JSON-LD signatures, or BBS+ proofs, which introduce additional tooling and integration challenges.

Simplification: One signature mechanism is used throughout. No need for libraries to support multiple proof types.

3. Native Transport Without Servers
Nostr uses relays to publish and retrieve events. Presentations and credentials are just messages on the network.
OID4VP depends on HTTP endpoints, OAuth flows, redirect URIs, and access token management.

Simplification: No web server, endpoints, or callback handling required. Data is discoverable through filters and subscriptions.

4. Consistent and Minimal Data Model
Nostr relies on a simple, flat event format (JSON with kind, content, and tags).
OID4VP mixes JWT, SD-JWT, JSON-LD, and other formats, often in nested structures with base64 encoding.

Simplification: One format, easy to parse, extend, and debug.

5. Verification Is Peer-to-Peer
Nostr allows any verifier to independently check the signature using the sender’s public key.
OID4VP often requires resolving the issuer’s DID, verifying its authenticity, and trusting metadata served from external sources.

Simplification: Trust is local and verifiable. If you trust the signer’s key, you can verify the claim.

6. No Authorization Code or Token Flows
Nostr doesn’t use redirect flows, scopes, or token lifecycles.
OID4VP brings in full OpenID Connect flows, including complex state management, authorization servers, and refresh tokens.

Simplification: The protocol is direct. No client registration or flow configuration.

7. Lightweight and Offline-Friendly
Nostr works in lightweight clients and is well-suited to mobile, offline, or peer-to-peer environments.
OID4VP requires stable HTTPS endpoints and complex orchestration between parties.

Simplification: Works anywhere JSON can be passed — over relays, NFC, QR codes, or Bluetooth.

Summary:
Nostr achieves what OID4VP sets out to do—support verifiable presentations—but with far less protocol overhead. It offers identity, transport, proof, and access in a unified and minimal system. Instead of stitching together multiple standards and dependencies, nostr uses a single model: signed data, distributed through relays, verifiable by anyone.