{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:ABN3RHODABWCMMW55BOODL2MLY","short_pith_number":"pith:ABN3RHOD","canonical_record":{"source":{"id":"1112.0827","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2011-12-05T03:49:16Z","cross_cats_sorted":["physics.soc-ph"],"title_canon_sha256":"01be21a245824d96f4d5b59dc7c0392534b76bb36ea75116e06866583d13098d","abstract_canon_sha256":"632103a22ba46882252578bf5ae0816d9991754afa806953f308ca8d15f3b407"},"schema_version":"1.0"},"canonical_sha256":"005bb89dc3006c2632dde85ce1af4c5e3eda9bff309d572b455410cd6c65c464","source":{"kind":"arxiv","id":"1112.0827","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1112.0827","created_at":"2026-05-18T04:06:57Z"},{"alias_kind":"arxiv_version","alias_value":"1112.0827v1","created_at":"2026-05-18T04:06:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1112.0827","created_at":"2026-05-18T04:06:57Z"},{"alias_kind":"pith_short_12","alias_value":"ABN3RHODABWC","created_at":"2026-05-18T12:26:24Z"},{"alias_kind":"pith_short_16","alias_value":"ABN3RHODABWCMMW5","created_at":"2026-05-18T12:26:24Z"},{"alias_kind":"pith_short_8","alias_value":"ABN3RHOD","created_at":"2026-05-18T12:26:24Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:ABN3RHODABWCMMW55BOODL2MLY","target":"record","payload":{"canonical_record":{"source":{"id":"1112.0827","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2011-12-05T03:49:16Z","cross_cats_sorted":["physics.soc-ph"],"title_canon_sha256":"01be21a245824d96f4d5b59dc7c0392534b76bb36ea75116e06866583d13098d","abstract_canon_sha256":"632103a22ba46882252578bf5ae0816d9991754afa806953f308ca8d15f3b407"},"schema_version":"1.0"},"canonical_sha256":"005bb89dc3006c2632dde85ce1af4c5e3eda9bff309d572b455410cd6c65c464","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:06:57.687869Z","signature_b64":"NtwXaVXU0Bxzc1Ehnl1eaj0A1ZBQZUeVk3d4sxETZS+kATPGDrY/HQKyIZaSTODzUpJuJHh4FIlIRojYENc3Cg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"005bb89dc3006c2632dde85ce1af4c5e3eda9bff309d572b455410cd6c65c464","last_reissued_at":"2026-05-18T04:06:57.687288Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:06:57.687288Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1112.0827","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":"2026-05-18T04:06:57Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"a49OFfwsl4VERXiH8eK/qGJew/xMfgADpPmQjhnS7FdRcPbYdwg+KemnROYah2z0l6lO6tERyaChXgDYEJZdBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T15:38:10.085253Z"},"content_sha256":"3a71469d7e8846cdeb32dadfeaf6cc86e5c0de2abcedd6bb2c4068b2f9303f3e","schema_version":"1.0","event_id":"sha256:3a71469d7e8846cdeb32dadfeaf6cc86e5c0de2abcedd6bb2c4068b2f9303f3e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:ABN3RHODABWCMMW55BOODL2MLY","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Systems Engineering for Civil Timekeeping","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.soc-ph"],"primary_cat":"astro-ph.IM","authors_text":"Rob Seaman","submitted_at":"2011-12-05T03:49:16Z","abstract_excerpt":"The future of Coordinated Universal Time has been a topic of energetic discussions for more than a dozen years. Different communities view the issue in different ways. Diametrically opposed visions exist for the range of appropriate solutions that should be entertained. Rather than an insoluble quandary, we suggest that well-known systems engineering best practices would provide a framework for reaching consensus. This starts with the coherent collection of project requirements."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1112.0827","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":""},"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":"2026-05-18T04:06:57Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+voie9Aqn6SOfmEf1fUmZ3ysIfx3/FQCtLdo6ER7ApfWVuLXdHOZBlEV76T6Tq+WQJHUgVE/IP86YvbgO5doBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T15:38:10.085632Z"},"content_sha256":"4b00690531cb8051e6a2f1ed45b97070d5ccebccad27e45ec96c4c229b236c12","schema_version":"1.0","event_id":"sha256:4b00690531cb8051e6a2f1ed45b97070d5ccebccad27e45ec96c4c229b236c12"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ABN3RHODABWCMMW55BOODL2MLY/bundle.json","state_url":"https://pith.science/pith/ABN3RHODABWCMMW55BOODL2MLY/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ABN3RHODABWCMMW55BOODL2MLY/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":"2026-06-02T15:38:10Z","links":{"resolver":"https://pith.science/pith/ABN3RHODABWCMMW55BOODL2MLY","bundle":"https://pith.science/pith/ABN3RHODABWCMMW55BOODL2MLY/bundle.json","state":"https://pith.science/pith/ABN3RHODABWCMMW55BOODL2MLY/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ABN3RHODABWCMMW55BOODL2MLY/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:ABN3RHODABWCMMW55BOODL2MLY","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":"632103a22ba46882252578bf5ae0816d9991754afa806953f308ca8d15f3b407","cross_cats_sorted":["physics.soc-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2011-12-05T03:49:16Z","title_canon_sha256":"01be21a245824d96f4d5b59dc7c0392534b76bb36ea75116e06866583d13098d"},"schema_version":"1.0","source":{"id":"1112.0827","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1112.0827","created_at":"2026-05-18T04:06:57Z"},{"alias_kind":"arxiv_version","alias_value":"1112.0827v1","created_at":"2026-05-18T04:06:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1112.0827","created_at":"2026-05-18T04:06:57Z"},{"alias_kind":"pith_short_12","alias_value":"ABN3RHODABWC","created_at":"2026-05-18T12:26:24Z"},{"alias_kind":"pith_short_16","alias_value":"ABN3RHODABWCMMW5","created_at":"2026-05-18T12:26:24Z"},{"alias_kind":"pith_short_8","alias_value":"ABN3RHOD","created_at":"2026-05-18T12:26:24Z"}],"graph_snapshots":[{"event_id":"sha256:4b00690531cb8051e6a2f1ed45b97070d5ccebccad27e45ec96c4c229b236c12","target":"graph","created_at":"2026-05-18T04:06:57Z","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"},"paper":{"abstract_excerpt":"The future of Coordinated Universal Time has been a topic of energetic discussions for more than a dozen years. Different communities view the issue in different ways. Diametrically opposed visions exist for the range of appropriate solutions that should be entertained. Rather than an insoluble quandary, we suggest that well-known systems engineering best practices would provide a framework for reaching consensus. This starts with the coherent collection of project requirements.","authors_text":"Rob Seaman","cross_cats":["physics.soc-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2011-12-05T03:49:16Z","title":"Systems Engineering for Civil Timekeeping"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1112.0827","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":"sha256:3a71469d7e8846cdeb32dadfeaf6cc86e5c0de2abcedd6bb2c4068b2f9303f3e","target":"record","created_at":"2026-05-18T04:06:57Z","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":"632103a22ba46882252578bf5ae0816d9991754afa806953f308ca8d15f3b407","cross_cats_sorted":["physics.soc-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2011-12-05T03:49:16Z","title_canon_sha256":"01be21a245824d96f4d5b59dc7c0392534b76bb36ea75116e06866583d13098d"},"schema_version":"1.0","source":{"id":"1112.0827","kind":"arxiv","version":1}},"canonical_sha256":"005bb89dc3006c2632dde85ce1af4c5e3eda9bff309d572b455410cd6c65c464","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"005bb89dc3006c2632dde85ce1af4c5e3eda9bff309d572b455410cd6c65c464","first_computed_at":"2026-05-18T04:06:57.687288Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:06:57.687288Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"NtwXaVXU0Bxzc1Ehnl1eaj0A1ZBQZUeVk3d4sxETZS+kATPGDrY/HQKyIZaSTODzUpJuJHh4FIlIRojYENc3Cg==","signature_status":"signed_v1","signed_at":"2026-05-18T04:06:57.687869Z","signed_message":"canonical_sha256_bytes"},"source_id":"1112.0827","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3a71469d7e8846cdeb32dadfeaf6cc86e5c0de2abcedd6bb2c4068b2f9303f3e","sha256:4b00690531cb8051e6a2f1ed45b97070d5ccebccad27e45ec96c4c229b236c12"],"state_sha256":"9ed5844040d309328beec88af56c16e0684e84d56ebe8ad8cbbc0c07d2ff8b3a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"L+oU/OGtjpB/6idHnfhT/IJ6fd9u6yh/6RkFzVhl4RYoZ8uhUj5KBOARrIDQ6/Oa8n7tSMXUvazVWX08+g8qDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T15:38:10.087651Z","bundle_sha256":"916807d8099f864594e2024a5199cf1162c299271d188c22f8387ea6e1807c09"}}