{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:HXWMYTEDRICGQ4HDZR7NLZYR72","short_pith_number":"pith:HXWMYTED","canonical_record":{"source":{"id":"2508.03409","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/publicdomain/zero/1.0/","primary_cat":"physics.hist-ph","submitted_at":"2025-08-05T12:55:06Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"a3b00499db58562e894a9b00fc756e389d45729995b71b9a5ee044b97914e127","abstract_canon_sha256":"cee602ab81935fdf9a7443dd66ba09b5178d63f965efee812346e8075d9517d3"},"schema_version":"1.0"},"canonical_sha256":"3deccc4c838a046870e3cc7ed5e711feabf975a0cd47799a1762006a4cf2b231","source":{"kind":"arxiv","id":"2508.03409","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2508.03409","created_at":"2026-07-05T11:49:59Z"},{"alias_kind":"arxiv_version","alias_value":"2508.03409v1","created_at":"2026-07-05T11:49:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2508.03409","created_at":"2026-07-05T11:49:59Z"},{"alias_kind":"pith_short_12","alias_value":"HXWMYTEDRICG","created_at":"2026-07-05T11:49:59Z"},{"alias_kind":"pith_short_16","alias_value":"HXWMYTEDRICGQ4HD","created_at":"2026-07-05T11:49:59Z"},{"alias_kind":"pith_short_8","alias_value":"HXWMYTED","created_at":"2026-07-05T11:49:59Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:HXWMYTEDRICGQ4HDZR7NLZYR72","target":"record","payload":{"canonical_record":{"source":{"id":"2508.03409","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/publicdomain/zero/1.0/","primary_cat":"physics.hist-ph","submitted_at":"2025-08-05T12:55:06Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"a3b00499db58562e894a9b00fc756e389d45729995b71b9a5ee044b97914e127","abstract_canon_sha256":"cee602ab81935fdf9a7443dd66ba09b5178d63f965efee812346e8075d9517d3"},"schema_version":"1.0"},"canonical_sha256":"3deccc4c838a046870e3cc7ed5e711feabf975a0cd47799a1762006a4cf2b231","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T11:49:59.673346Z","signature_b64":"wDSSz9awg2yrex1uYNxxYo68Jze6H3UNhhWWAqev5DcgYT8smyPa9hHti7nVq+69t+XY2lNLgBKkvYLvz85pDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3deccc4c838a046870e3cc7ed5e711feabf975a0cd47799a1762006a4cf2b231","last_reissued_at":"2026-07-05T11:49:59.672893Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T11:49:59.672893Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2508.03409","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T11:49:59Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"hGlpCmHAOoyUMsoXWBogcoFeZvwTx0BfmPGAvujTwyItGLcq8AV2Irf6HpL+IoNYfRtC9Hxif7j2McOFNXsnCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-13T04:47:04.224125Z"},"content_sha256":"bd43e7ee41dfca5df370e81fe1cddc10c29db5148d3125e98d44ce116e3999e1","schema_version":"1.0","event_id":"sha256:bd43e7ee41dfca5df370e81fe1cddc10c29db5148d3125e98d44ce116e3999e1"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:HXWMYTEDRICGQ4HDZR7NLZYR72","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Cornelis Easton:The Milky Way as a spiral galaxy","license":"http://creativecommons.org/publicdomain/zero/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"physics.hist-ph","authors_text":"Pieter C. van der Kruit (Kapteyn Astronomical Institute, the Netherlands), University of Groningen","submitted_at":"2025-08-05T12:55:06Z","abstract_excerpt":"Cornelis Easton (1864-1929) became a journalist and newspaper editor. During most of his career he was active as an amateur astronomer and contributed important papers in international astronomical journals This concerned three areas. The first was mapping the Milky Way. The book, La Voie Lactee dans l'hemisphere boreal, which he published in 1893, made some impression. Since it had in addition to drawings of the surface brightness of the Milky Way, also extensive descriptions and discussions of features in the structure and a comprehensive, essentially complete, listing and discussion on ever"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2508.03409","kind":"arxiv","version":1},"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/2508.03409/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":"2026-07-05T11:49:59Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7PzL1g4SMCYkFW27U7wC28bOOQNi99zbdlBrFfm7OOrlvWTi2JH8CYAfIhGa8vSdK8K4SPzu5yl8TawS4Hw+CQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-13T04:47:04.224757Z"},"content_sha256":"f6d8515501d4722460b8a9377bd438ed59ed8c9a7a37fcdbd9dbebacf58c9e1e","schema_version":"1.0","event_id":"sha256:f6d8515501d4722460b8a9377bd438ed59ed8c9a7a37fcdbd9dbebacf58c9e1e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/HXWMYTEDRICGQ4HDZR7NLZYR72/bundle.json","state_url":"https://pith.science/pith/HXWMYTEDRICGQ4HDZR7NLZYR72/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/HXWMYTEDRICGQ4HDZR7NLZYR72/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":"2026-08-13T04:47:04Z","links":{"resolver":"https://pith.science/pith/HXWMYTEDRICGQ4HDZR7NLZYR72","bundle":"https://pith.science/pith/HXWMYTEDRICGQ4HDZR7NLZYR72/bundle.json","state":"https://pith.science/pith/HXWMYTEDRICGQ4HDZR7NLZYR72/state.json","well_known_bundle":"https://pith.science/.well-known/pith/HXWMYTEDRICGQ4HDZR7NLZYR72/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:HXWMYTEDRICGQ4HDZR7NLZYR72","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":"cee602ab81935fdf9a7443dd66ba09b5178d63f965efee812346e8075d9517d3","cross_cats_sorted":["astro-ph.GA"],"license":"http://creativecommons.org/publicdomain/zero/1.0/","primary_cat":"physics.hist-ph","submitted_at":"2025-08-05T12:55:06Z","title_canon_sha256":"a3b00499db58562e894a9b00fc756e389d45729995b71b9a5ee044b97914e127"},"schema_version":"1.0","source":{"id":"2508.03409","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2508.03409","created_at":"2026-07-05T11:49:59Z"},{"alias_kind":"arxiv_version","alias_value":"2508.03409v1","created_at":"2026-07-05T11:49:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2508.03409","created_at":"2026-07-05T11:49:59Z"},{"alias_kind":"pith_short_12","alias_value":"HXWMYTEDRICG","created_at":"2026-07-05T11:49:59Z"},{"alias_kind":"pith_short_16","alias_value":"HXWMYTEDRICGQ4HD","created_at":"2026-07-05T11:49:59Z"},{"alias_kind":"pith_short_8","alias_value":"HXWMYTED","created_at":"2026-07-05T11:49:59Z"}],"graph_snapshots":[{"event_id":"sha256:f6d8515501d4722460b8a9377bd438ed59ed8c9a7a37fcdbd9dbebacf58c9e1e","target":"graph","created_at":"2026-07-05T11:49:59Z","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/2508.03409/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Cornelis Easton (1864-1929) became a journalist and newspaper editor. During most of his career he was active as an amateur astronomer and contributed important papers in international astronomical journals This concerned three areas. The first was mapping the Milky Way. The book, La Voie Lactee dans l'hemisphere boreal, which he published in 1893, made some impression. Since it had in addition to drawings of the surface brightness of the Milky Way, also extensive descriptions and discussions of features in the structure and a comprehensive, essentially complete, listing and discussion on ever","authors_text":"Pieter C. van der Kruit (Kapteyn Astronomical Institute, the Netherlands), University of Groningen","cross_cats":["astro-ph.GA"],"headline":"","license":"http://creativecommons.org/publicdomain/zero/1.0/","primary_cat":"physics.hist-ph","submitted_at":"2025-08-05T12:55:06Z","title":"Cornelis Easton:The Milky Way as a spiral galaxy"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2508.03409","kind":"arxiv","version":1},"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:bd43e7ee41dfca5df370e81fe1cddc10c29db5148d3125e98d44ce116e3999e1","target":"record","created_at":"2026-07-05T11:49:59Z","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":"cee602ab81935fdf9a7443dd66ba09b5178d63f965efee812346e8075d9517d3","cross_cats_sorted":["astro-ph.GA"],"license":"http://creativecommons.org/publicdomain/zero/1.0/","primary_cat":"physics.hist-ph","submitted_at":"2025-08-05T12:55:06Z","title_canon_sha256":"a3b00499db58562e894a9b00fc756e389d45729995b71b9a5ee044b97914e127"},"schema_version":"1.0","source":{"id":"2508.03409","kind":"arxiv","version":1}},"canonical_sha256":"3deccc4c838a046870e3cc7ed5e711feabf975a0cd47799a1762006a4cf2b231","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3deccc4c838a046870e3cc7ed5e711feabf975a0cd47799a1762006a4cf2b231","first_computed_at":"2026-07-05T11:49:59.672893Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T11:49:59.672893Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"wDSSz9awg2yrex1uYNxxYo68Jze6H3UNhhWWAqev5DcgYT8smyPa9hHti7nVq+69t+XY2lNLgBKkvYLvz85pDQ==","signature_status":"signed_v1","signed_at":"2026-07-05T11:49:59.673346Z","signed_message":"canonical_sha256_bytes"},"source_id":"2508.03409","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:bd43e7ee41dfca5df370e81fe1cddc10c29db5148d3125e98d44ce116e3999e1","sha256:f6d8515501d4722460b8a9377bd438ed59ed8c9a7a37fcdbd9dbebacf58c9e1e"],"state_sha256":"a2a4f4218e9c5035e649c5870369c916548d6d6bd5cecd0bf0e5f4143e0ac04a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"JKt///5q0a19imaejDt/ARbJcx5qveCjelUfDzuz2/UGTBxva/E8kAU4CQt3zWCq5BGu2tehP8luREFvtoPHCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-13T04:47:04.230162Z","bundle_sha256":"d4bf7882663032597a0d67175c5267caa9c907abd34915ced06da9f3f7f0cc95"}}