{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:UBC2XPPULGLLHNB5G6O2QEJHLK","short_pith_number":"pith:UBC2XPPU","canonical_record":{"source":{"id":"2011.10559","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2020-11-20T18:55:01Z","cross_cats_sorted":[],"title_canon_sha256":"edab8b187582fbc3d9b0a35cb1ef70c07feb769676381c977360434578383cf7","abstract_canon_sha256":"ce85c4b8aca56dd9f01e6f6608cd63e9b7c2589d06d3dfbf90556ce97a6e5534"},"schema_version":"1.0"},"canonical_sha256":"a045abbdf45996b3b43d379da811275ab60d72dec848287204e178afbbecf739","source":{"kind":"arxiv","id":"2011.10559","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2011.10559","created_at":"2026-07-05T04:32:36Z"},{"alias_kind":"arxiv_version","alias_value":"2011.10559v2","created_at":"2026-07-05T04:32:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2011.10559","created_at":"2026-07-05T04:32:36Z"},{"alias_kind":"pith_short_12","alias_value":"UBC2XPPULGLL","created_at":"2026-07-05T04:32:36Z"},{"alias_kind":"pith_short_16","alias_value":"UBC2XPPULGLLHNB5","created_at":"2026-07-05T04:32:36Z"},{"alias_kind":"pith_short_8","alias_value":"UBC2XPPU","created_at":"2026-07-05T04:32:36Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:UBC2XPPULGLLHNB5G6O2QEJHLK","target":"record","payload":{"canonical_record":{"source":{"id":"2011.10559","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2020-11-20T18:55:01Z","cross_cats_sorted":[],"title_canon_sha256":"edab8b187582fbc3d9b0a35cb1ef70c07feb769676381c977360434578383cf7","abstract_canon_sha256":"ce85c4b8aca56dd9f01e6f6608cd63e9b7c2589d06d3dfbf90556ce97a6e5534"},"schema_version":"1.0"},"canonical_sha256":"a045abbdf45996b3b43d379da811275ab60d72dec848287204e178afbbecf739","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T04:32:36.620006Z","signature_b64":"gu6xuT963DVnay10JKwsJXl7v8E/CJvlPsFhIie6w7h/9fz/CPyWhzsjZfkNmxHWa3mJafTkQQIQDvhIf0QTAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a045abbdf45996b3b43d379da811275ab60d72dec848287204e178afbbecf739","last_reissued_at":"2026-07-05T04:32:36.619508Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T04:32:36.619508Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2011.10559","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T04:32:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tj/xfU2RFPmFJBqooDl42PnQQV/9XU4QEv8Qqm9zuy0qygstykf3XccrGru6nj8rINalxOucr84tX4vYFiBzCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-07T19:04:55.871565Z"},"content_sha256":"90cdfc2bc82f96f6b34baa1307891afd1d6f7475237ceb785a556ac69d68327a","schema_version":"1.0","event_id":"sha256:90cdfc2bc82f96f6b34baa1307891afd1d6f7475237ceb785a556ac69d68327a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:UBC2XPPULGLLHNB5G6O2QEJHLK","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A look at the Hubble speed from first principles","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Alessandra Silvestri, Fabrizio Renzi","submitted_at":"2020-11-20T18:55:01Z","abstract_excerpt":"We introduce a novel way of measuring $H_0$ from a combination of independent geometrical datasets, with no need of calibration nor of the choice of a cosmological model. We build on the {\\it distance duality relation} which sets the ratio of the luminosity and angular diameter distance to a fixed scaling in redshift for any metric theory of gravity with standard photon propagation and constitutes a founding block of any theory describing our Universe. Our method provides the unprecedented possibility of determining $H_0$ from first principles, unleashing the measurement of this fundamental co"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2011.10559","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2011.10559/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T04:32:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qoiCWMymg17f2XWD79FloFVAiv+DaEi2UURFChffjB0slhsXGqi/rkAYLBuoQMeH/kao846GMaX3I1rSWTkiBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-07T19:04:55.872049Z"},"content_sha256":"71f4280b7b934b65c095ddcc7cd7447dc61f6070b64da40e90e16e3981604bd6","schema_version":"1.0","event_id":"sha256:71f4280b7b934b65c095ddcc7cd7447dc61f6070b64da40e90e16e3981604bd6"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/UBC2XPPULGLLHNB5G6O2QEJHLK/bundle.json","state_url":"https://pith.science/pith/UBC2XPPULGLLHNB5G6O2QEJHLK/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/UBC2XPPULGLLHNB5G6O2QEJHLK/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-08-07T19:04:55Z","links":{"resolver":"https://pith.science/pith/UBC2XPPULGLLHNB5G6O2QEJHLK","bundle":"https://pith.science/pith/UBC2XPPULGLLHNB5G6O2QEJHLK/bundle.json","state":"https://pith.science/pith/UBC2XPPULGLLHNB5G6O2QEJHLK/state.json","well_known_bundle":"https://pith.science/.well-known/pith/UBC2XPPULGLLHNB5G6O2QEJHLK/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:UBC2XPPULGLLHNB5G6O2QEJHLK","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"ce85c4b8aca56dd9f01e6f6608cd63e9b7c2589d06d3dfbf90556ce97a6e5534","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2020-11-20T18:55:01Z","title_canon_sha256":"edab8b187582fbc3d9b0a35cb1ef70c07feb769676381c977360434578383cf7"},"schema_version":"1.0","source":{"id":"2011.10559","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2011.10559","created_at":"2026-07-05T04:32:36Z"},{"alias_kind":"arxiv_version","alias_value":"2011.10559v2","created_at":"2026-07-05T04:32:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2011.10559","created_at":"2026-07-05T04:32:36Z"},{"alias_kind":"pith_short_12","alias_value":"UBC2XPPULGLL","created_at":"2026-07-05T04:32:36Z"},{"alias_kind":"pith_short_16","alias_value":"UBC2XPPULGLLHNB5","created_at":"2026-07-05T04:32:36Z"},{"alias_kind":"pith_short_8","alias_value":"UBC2XPPU","created_at":"2026-07-05T04:32:36Z"}],"graph_snapshots":[{"event_id":"sha256:71f4280b7b934b65c095ddcc7cd7447dc61f6070b64da40e90e16e3981604bd6","target":"graph","created_at":"2026-07-05T04:32:36Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2011.10559/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We introduce a novel way of measuring $H_0$ from a combination of independent geometrical datasets, with no need of calibration nor of the choice of a cosmological model. We build on the {\\it distance duality relation} which sets the ratio of the luminosity and angular diameter distance to a fixed scaling in redshift for any metric theory of gravity with standard photon propagation and constitutes a founding block of any theory describing our Universe. Our method provides the unprecedented possibility of determining $H_0$ from first principles, unleashing the measurement of this fundamental co","authors_text":"Alessandra Silvestri, Fabrizio Renzi","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2020-11-20T18:55:01Z","title":"A look at the Hubble speed from first principles"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2011.10559","kind":"arxiv","version":2},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:90cdfc2bc82f96f6b34baa1307891afd1d6f7475237ceb785a556ac69d68327a","target":"record","created_at":"2026-07-05T04:32:36Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"ce85c4b8aca56dd9f01e6f6608cd63e9b7c2589d06d3dfbf90556ce97a6e5534","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2020-11-20T18:55:01Z","title_canon_sha256":"edab8b187582fbc3d9b0a35cb1ef70c07feb769676381c977360434578383cf7"},"schema_version":"1.0","source":{"id":"2011.10559","kind":"arxiv","version":2}},"canonical_sha256":"a045abbdf45996b3b43d379da811275ab60d72dec848287204e178afbbecf739","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a045abbdf45996b3b43d379da811275ab60d72dec848287204e178afbbecf739","first_computed_at":"2026-07-05T04:32:36.619508Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T04:32:36.619508Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"gu6xuT963DVnay10JKwsJXl7v8E/CJvlPsFhIie6w7h/9fz/CPyWhzsjZfkNmxHWa3mJafTkQQIQDvhIf0QTAA==","signature_status":"signed_v1","signed_at":"2026-07-05T04:32:36.620006Z","signed_message":"canonical_sha256_bytes"},"source_id":"2011.10559","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:90cdfc2bc82f96f6b34baa1307891afd1d6f7475237ceb785a556ac69d68327a","sha256:71f4280b7b934b65c095ddcc7cd7447dc61f6070b64da40e90e16e3981604bd6"],"state_sha256":"484e6b880111b68db0b3b3b948b1112cf1e28cac69aab3ff734b67c7da4e6500"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"St/5Infv19IxfwU4JyVK7vQauBSYUE26JCC7Wc3FbvdtSZmXycHSm0IJBnP2n9vQ/LDMBL/zzVDLIM8+SZOcCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-07T19:04:55.876178Z","bundle_sha256":"27b5c8a175b10df37b30ad1dd1143da206e752457668ce399865ce51d7fff949"}}