The blockchain choice affects cost, privacy, interoperability, and regulatory compliance. Pick the wrong blockchain, and you’ll spend months explaining to institutional investors why their holdings aren’t auditable.
Public blockchains like Ethereum are open networks, which means anyone can view transactions and interact with supported applications. The advantages include higher interoperability, allowing for transactions between the token and other digital currencies, including stablecoins, NFTs, and DeFi protocols. In some structures, a tokenized real estate position could be used as collateral in lending protocols. Investors may be able to trade tokens outside traditional market hours, but only on venues that support the required compliance checks.
Public blockchains can support 24/7 access to compliant secondary markets, regulated exchanges, and approved liquidity pools.
The main downside of public chains is visibility: transaction amounts, wallet addresses, and trading patterns are public. For some institutional investors, this is a dealbreaker.
In permissioned blockchains, you have more freedom. Though such blockchains may offer more privacy and security, they tend to work in their own bubbles, which reduces interoperability. That can make it harder to connect with external wallets, exchanges, DeFi protocols, or liquidity venues.
In many projects, I see hybrid architectures become the go-to option:
- Core token issuance and compliance on a permissioned layer
- A controlled bridge or integration with a public blockchain for secondary market access
- Best of both worlds: privacy for primary issuance, liquidity for secondary trading
Then comes custody. There are two different custody questions here:
Asset custody answers where the physical asset is. For tangible movable assets like whiskey barrels or gold, you may need qualified custodians, trustees, or licensed managers to store and manage them according to the security measures. For real estate, “custody” might mean a trustee holding legal title. For fine art, it’s a secure storage facility with insurance and climate control.
Token custody answers where the digital tokens are held. It may be self-custody wallets, licensed digital asset custodians, or both. Self-custody means investors control their own private keys. For institutional investors or high-net-worth individuals, licensed digital asset custodians may be a better fit because they are subject to stringent requirements for security, operational integrity, and compliance. If you’re trying to attract serious capital, your custody infrastructure needs to match institutional standards.
Many platforms integrate with multiple custody providers so investors can choose a preferred option. Custody answers where the assets and tokens are held, but there are also oracles that answer a different question: how does your smart contract know what’s happening in the real world?
Your tokenized real estate system needs to know:
- What’s the current property value?
- Has the monthly rent been paid?
- Has the insurance policy been renewed?
- Has there been damage that affects the value?
Your tokenized treasury bill system needs to know:
- What’s the current market price?
- When is the next interest payment due?
- Has the Treasury bill matured?
Oracles are services that feed external data to smart contracts in a verifiable way. In cases of RWA tokenization, they offer important real-world data that cannot be accessed by the smart contracts independently. Without it, smart contracts can only process information already recorded on-chain.
Chainlink Proof of Reserve provides cryptographic proof that off-chain reserves — gold in a vault, dollars in a bank account, real estate title — match or exceed the on-chain token supply. The oracle periodically checks the asset’s status with trusted data providers and updates an on-chain reference that smart contracts can query.
Price feed oracles like Pyth and RedStone provide real-time pricing for financial assets, commodities, and securities that need continuous pricing updates.
Custom asset valuation oracles handle unique assets like real estate or art through licensed appraisers submitting valuations, multisig verification from multiple sources, and time-weighted average pricing to prevent manipulation.