drand

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croviatrust / countersign

TACET — verifiable silence for AI training-data disclosure. Hourly epochs opened by drand, closed by Bitcoin; a public predicate over model cards; offline-verifiable proofs of absence as crovia.seal.v1. Spec, reference, conformance vectors, live operator.

python cryptography bitcoin provenance ed25519 opentimestamps training-data sparse-merkle-tree huggingface drand transparency-log ai-governance eu-ai-act ai-transparency proof-of-absence

Updated Sep 21, 2026
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AlverGant / quantum-draw

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Verifiable raffles: quantum entropy from IBM hardware sealed under a Merkle root, mixed with drand, with a CHSH witness in every proof. Runs on a Cloudflare Worker.

python typescript quantum-computing merkle-tree raffle qiskit provably-fair cloudflare-workers drand commit-reveal randomness-beacon ibm-quantum verifiable-randomness

Updated Sep 18, 2026
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