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Generate and verify cryptographic proofs of verification.

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What are Attestations?

An attestation is a cryptographically signed proof that a verification occurred. It:
  • Uses ES256 (ECDSA P-256) signatures
  • Is formatted as a JWT
  • Can be verified independently
  • Can be stored on-chain

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Requesting Attestations

result = client.verify(
    "2+2=4",
    include_attestation=True
)

print(result.attestation)
# eyJhbGciOiJFUzI1NiIsInR5cCI6InF3ZWQtYXR0ZXN...

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Attestation Structure

{
  "alg": "ES256",
  "typ": "qwed-attestation+jwt",
  "kid": "did:qwed:node:production#signing-key-2024"
}

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Payload

{
  "iss": "did:qwed:node:production",
  "sub": "sha256:abc123...",
  "iat": 1703073600,
  "exp": 1734609600,
  "jti": "att_xyz789",
  "qwed": {
    "version": "1.0",
    "result": {
      "status": "VERIFIED",
      "verified": true,
      "engine": "math",
      "confidence": 1.0
    },
    "query_hash": "sha256:def456...",
    "proof_hash": "sha256:ghi789..."
  }
}

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Verifying Attestations

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Using the API

valid, claims, error = client.verify_attestation(jwt)
if valid:
    print(f"Verified by: {claims['iss']}")

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Using the SDK

from qwed_sdk import verify_attestation

is_valid = verify_attestation(
    jwt="eyJhbGci...",
    trusted_issuers=["did:qwed:node:production"]
)

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Trust Anchors

QWED maintains a registry of trusted attestation issuers:
Issuer DIDNameStatus
did:qwed:node:productionQWED Production✅ Active
did:qwed:node:stagingQWED Staging✅ Active

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Attestation Chains

Link multiple attestations together: 
attestation1 = client.verify("step1", include_attestation=True)
attestation2 = client.verify(
    "step2",
    include_attestation=True,
    chain_id="chain_abc",
    chain_index=1,
    previous_attestation=attestation1.jti
)

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Use Cases

  1. Audit Trails - Prove AI outputs were verified
  2. Compliance - Regulatory verification records
  3. Blockchain - Anchor proofs on-chain
  4. Badges - Show verification status in UIs

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Badge Integration

Embed attestation badges: 
![Verified](https://api.qwedai.com/badge/attestation/att_xyz789)