{
  "sample_notice": "Synthetic demo-only evidence bundle. Not a production attestation and not customer data.",
  "schema_version": "certisigma.sample.evidence-bundle.v1",
  "format_version": "1.0-demo",
  "id": "sample-evidence-bundle-t0t1t2",
  "attestation_id": "att_demo_bundle_20260520_001",
  "hash_hex": "2cf24dba5fb0a30e26e83b2ac5b9e29e1b161e5c1fa7425e73043362938b9824",
  "algorithm": "SHA-256",
  "timestamp": "2026-05-20T08:30:00Z",
  "level": "T2",
  "subject": {
    "kind": "demo_document",
    "label": "synthetic evidence bundle sample",
    "content_policy": "Original content is not included in this bundle."
  },
  "t0": {
    "signature_algorithm": "ECDSA-P256-SHA256",
    "public_key_fingerprint_sha256": "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855",
    "signature_b64": "U0FNUExFX1QwX1NJR05BVFVSRV9OT1RfUkVBTA==",
    "signed_payload": {
      "hash_hex": "2cf24dba5fb0a30e26e83b2ac5b9e29e1b161e5c1fa7425e73043362938b9824",
      "created_at": "2026-05-20T08:30:00Z",
      "evidence_level": "T0"
    }
  },
  "t1": {
    "timestamp": "2026-05-20T08:45:00Z",
    "provider": "qualified TSA sample placeholder",
    "merkle_root_sha256": "b94d27b9934d3e08a52e52d7da7dabfadeb52f6170933e0ee8f33c4f2d14a1aa",
    "tsa_token_b64": "U0FNUExFX1QxX1RTQV9UT0tFTl9OT1RfUkVBTA=="
  },
  "t2": {
    "timestamp": "2026-05-20T09:10:00Z",
    "anchor": "OpenTimestamps demo placeholder",
    "bitcoin_block_height": 840001,
    "ots_proof_b64": "U0FNUExFX1QyX09UU19QUk9PRl9OT1RfUkVBTA=="
  },
  "limits": [
    "This sample demonstrates bundle shape only.",
    "It does not prove authorship, ownership, content truth or legal outcome.",
    "The original content is not present."
  ]
}