This provider exposes the Witness API (3hcvxvrh.nx.link) that delivers on-chain checkpoint data and Merkle-tree utilities for the Base network. It provides endpoints to fetch latest and historical checkpoints, locate checkpoints by transaction hash or timestamp, and retrieve leaf/node hashes and Merkle proofs for programmatic inclusion verification and timestamping. With a fixed low request price, it is aimed at monitoring, light-client verification, verifiable storage, and audit/analytics workflows.
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