·Demos

Live receipts you can verify yourself.

Each demo below is a real anchor on Bitcoin SV mainnet, with the bundles, commit docs, and reveal payloads downloadable on the page. Drop any of them into /verify and confirm what the page says — without trusting Satsignal.

01Catalog

Two demos, two properties.

01

Sealed bid →

Five bidders sealed an amount each. The whole table was anchored in a single transaction (merkle-row-sealed-v1). Later, only one row was disclosed — the other four stay HMAC-sealed under salts the auditor never sees.

Property: selective disclosure of low-entropy rows. A plain SHA-256 leaf would be brute-forceable; the per-leaf HMAC under an HKDF-derived salt isn’t.

02

Agent evaluation →

Before a grader agent scored five student answers, its rubric / instruction / tools / budget / model config were hashed and anchored as a policy_snapshot. After, the five verdicts were Merkle-batched into an evidence_bundle. Both transactions are seconds apart in BSV chain order.

Property: chain-ordered timestamps. The policy provably predates the verdicts — not by Satsignal assertion, but by independent miner attestation.

Want to see how each demo was built? Each demo links its stdlib helper at the bottom of its page. The full helper catalog lives in docs — helpers.