Signed attestation

{
  "alg": "Ed25519",
  "amount": "50272027.76",
  "attested_at": "2026-07-22T00:52:23Z",
  "attested_at_caveat": "self-asserted attestation time — not independently timestamped, not a claim of temporal precedence",
  "block": "25583588",
  "block_time": "2026-07-21 20:48:11+00",
  "chain": "usdt",
  "disclaimer": "The transaction fact (txid, amount, block, addresses) is independently verifiable on-chain. flow_type and entity labels are Swiss Whale Intelligence interpretations, not on-chain facts. This Ed25519 signature attests authorship by Swiss Whale Intelligence, not the correctness of the interpretation.",
  "entities": {
    "from": {
      "proof_url": "https://static.okx.com/cdn/okx/por/chain/por_csv_2026050700_V2.zip",
      "source": "por_okx",
      "source_human": "OKX Proof-of-Reserves, signature-verified",
      "tier": 1,
      "verified_at": "2026-05-31"
    },
    "to": {
      "proof_url": "https://static.okx.com/cdn/okx/por/chain/por_csv_2026050700_V2.zip",
      "source": "por_okx",
      "source_human": "OKX Proof-of-Reserves, signature-verified",
      "tier": 1,
      "verified_at": "2026-05-31"
    }
  },
  "flow_type": "to_exchange",
  "from_address": "0x3b98b9e9cb75c1cb1729aab8f09ced2936505e4f",
  "key_id": "swi-ed25519-8a0381c77bc3f06c",
  "methodology": {
    "whitepaper_sha256": "55ed9f0d6dbaf609a482a5941e53be8f08bc3891920e0b2e5928ac142f716326",
    "whitepaper_version": "v1"
  },
  "schema": "swi-attest/1",
  "to_address": "0xb0a27099582833c0cb8c7a0565759ff145113d64",
  "txid": "0x6cbad653fd78419c4c46f5fc61c152da54cc930e819767851c3449831d1533f6",
  "unit": "USDT",
  "usd_at_tx": "50272027.76"
}