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      "authority_program_revision_digest": null,
      "assertions": [
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          "polarity": "supports",
          "proof_kind": "observed",
          "derivation_rule": null,
          "locators": [
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      "polarity": "supports",
      "binding_method": "sourcey-reviewed-exact-path",
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      "key_id": "key_sourcey_evidence_2026_01",
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      "signature": "XILZ25CkCc/OWu/hJUhD7TMq3YHSfbzRMtrzm8WJj7Kg0M2/sFs5tBM6DdzJBMRjAvhH4EgG6HXpi8ICprcoBQ=="
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}