Verify Tokenized Stock Holdings on Robinhood Chain

On July 1, Robinhood took its own blockchain to public mainnet. Three weeks later it holds tokenized Tesla, NVIDIA, Apple, SPY, and dozens more equities as plain ERC-20 tokens, plus the USDG stablecoin, with over a billion dollars in on-chain trading volume in week one. As of today, InsumerAPI reads it. Chain ID 4663 is live as chain number 38, and every condition type that works on any EVM chain works here.

Why this chain is different

Most new chains launch with the same assets as every other chain: a gas token, bridged stablecoins, and whatever DeFi shows up. Robinhood Chain launched with something no other public chain has at this scale: real US equities as tokens. Tokenized TSLA, NVDA, AAPL, SPY, and even private names like SpaceX live on the chain as standard ERC-20 contracts, with canonical addresses published in an on-chain asset registry.

That changes what a wallet can prove. Until now, "verify my holdings" meant crypto assets. On Robinhood Chain, a wallet can hold stock exposure, and anything that can be held in a wallet can be verified with a condition.

What you can verify today

• Tokenized stock holdings. A token_balance condition against a stock token contract answers "does this wallet hold at least N tokenized shares" with a signed true or false. The balance itself is never exposed.
• USDG balances. The chain's native stablecoin is USDG, the Global Dollar. Same condition type, same signed boolean.
• NFT ownership. Standard ERC-721 and ERC-1155 checks work like on any EVM chain.
• Ratio conditions. ratio_to_amount and ratio_to_supply work on day one, so agent spend rules and share-of-supply rules carry over unchanged.
• Merkle proofs. Robinhood Chain supports EIP-1186 storage proofs, so proof: "merkle" returns cryptographic evidence tied to the chain's own state. It joins the proof-capable set, now 28 of 32 EVM chains.

The call

Nothing new to learn. Use chain ID 4663 and any token contract on the chain. Here is a verification against USDG, the chain's stablecoin:

curl -X POST https://api.insumermodel.com/v1/attest \
  -H "X-API-Key: YOUR_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "wallet": "0xYOUR_WALLET",
    "conditions": [{
      "type": "token_balance",
      "chainId": 4663,
      "contractAddress": "0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168",
      "threshold": "1000"
    }]
  }'

The response is a signed attestation: met: true or met: false, a block number and timestamp anchoring exactly when the state was read, and an ECDSA signature any verifier can check offline against our published JWKS. Decimals are detected automatically. Swap the contract address for a tokenized stock from the chain's asset registry and the same call proves equity exposure instead.

Proving stock exposure without a brokerage statement

This is the part worth pausing on. A wallet that holds tokenized SPY can now prove "I hold at least 10 units" to any third party, cryptographically, in one API call, without revealing its actual position, its transaction history, or anything else. No brokerage login. No screenshot of a statement. No trusted intermediary vouching for the claim.

The applications write themselves. A community for verified shareholders. Agent counterparty checks that include equity exposure. Compliance gates that require proof of holdings before granting access. The same condition-based access model that works for tokens and NFTs now extends to the asset class most people actually own.

The full picture

InsumerAPI now reads 38 chains: 32 EVM chains plus Solana, XRP Ledger, Bitcoin, Tron, Stellar, and Sui. Robinhood Chain is included in the free tier like every other chain, and there is no per-chain integration. If your code already calls POST /v1/attest, you support Robinhood Chain by changing one number.

Full details are in the changelog and the API reference.