Signed Tree Head
Connecting…Log ID (SHA-256 of SPKI)
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Tree size (canonical leaves)
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Merkle root hash
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STH timestamp
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Chain age
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Log signature (ECDSA P-256)
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Recent leaves
The last 10 canonical leaves. Each is verifiable by inclusion proof and replayable gate-by-gate.
Fetching recent leaves from log.obligationsign.com…
What this page verifies
The Signed Tree Head (STH) is signed by the log operator's ECDSA P-256 key. The log_id is the SHA-256 of that key's SPKI — self-certifying, permanent identity. You can verify the log_signature yourself against the published SPKI at /patents and in the GitHub repo at /public-keys/log-operator.spki.b64.
Every leaf links to both a cryptographic inclusion proof (verify) and a gate-by-gate replay (replay). You need no access to ObligationSign's systems to verify either.