Black Lake launches Harbor Verify to let investors check tokenized credit pools without exposing borrower data
Black Lake Digital Markets has introduced Harbor Verify, a browser-accessible blockchain tool built to let investors, lenders, auditors, and rating agencies independently verify whether tokenized real-world assets meet a pool’s published eligibility standards. The company says the system works without revealing nonpublic borrower information, replacing a review process that has often relied on bilateral reports, restricted data rooms, redacted files, and attestations from parties involved in building or reviewing a portfolio. The tool runs two core checks. One confirms that the correct eligibility rulebook was used by matching hashes from the published rulebook, the loan proof, and the onchain record. The other verifies that a loan actually belongs in a given pool by reconstructing the pool’s Merkle commitments and checking a zero-knowledge proof that the loan met the pool’s rules. Black Lake says failed checks show the exact step and value that did not match. Harbor Verify is being applied first to a $25 million portfolio of residential mortgage loans. Black Lake also said the system could be used beyond its own issuance, and plans to make it available to other issuers under the Harbor Verify mark. The company pointed to its June 2026 work with Nuva Labs, involving more than 4,000 down payment assistance mortgage loans worth over $25 million on Provenance Blockchain, as an early example of how the verification process can be used before assets are distributed to investors.
