{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:6HF3WCNWSH2RCLLGD35UOHO6TJ","short_pith_number":"pith:6HF3WCNW","canonical_record":{"source":{"id":"1801.02721","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-01-08T23:34:33Z","cross_cats_sorted":[],"title_canon_sha256":"b1b03cd47f837a72975344954e752c9f2e2e541b7200bf5ecefe334e86d08214","abstract_canon_sha256":"bba983ae34cd29a5cbe5e33f0c07c52a357aaa8f30ac6bf833b8fa5857f650b4"},"schema_version":"1.0"},"canonical_sha256":"f1cbbb09b691f5112d661efb471dde9a7159b4fbc33fd0cd03e54602760ad27c","source":{"kind":"arxiv","id":"1801.02721","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1801.02721","created_at":"2026-05-18T00:26:22Z"},{"alias_kind":"arxiv_version","alias_value":"1801.02721v1","created_at":"2026-05-18T00:26:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1801.02721","created_at":"2026-05-18T00:26:22Z"},{"alias_kind":"pith_short_12","alias_value":"6HF3WCNWSH2R","created_at":"2026-05-18T12:32:08Z"},{"alias_kind":"pith_short_16","alias_value":"6HF3WCNWSH2RCLLG","created_at":"2026-05-18T12:32:08Z"},{"alias_kind":"pith_short_8","alias_value":"6HF3WCNW","created_at":"2026-05-18T12:32:08Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:6HF3WCNWSH2RCLLGD35UOHO6TJ","target":"record","payload":{"canonical_record":{"source":{"id":"1801.02721","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-01-08T23:34:33Z","cross_cats_sorted":[],"title_canon_sha256":"b1b03cd47f837a72975344954e752c9f2e2e541b7200bf5ecefe334e86d08214","abstract_canon_sha256":"bba983ae34cd29a5cbe5e33f0c07c52a357aaa8f30ac6bf833b8fa5857f650b4"},"schema_version":"1.0"},"canonical_sha256":"f1cbbb09b691f5112d661efb471dde9a7159b4fbc33fd0cd03e54602760ad27c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:26:22.613377Z","signature_b64":"phUCswL6NpfWfXgMIEECnBBiSVRiz7vKVQPgzdSPqZ8Dor7cFRr+/+l+hYFy13vWDtGdHKGDSyhYn/0eS6gbAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f1cbbb09b691f5112d661efb471dde9a7159b4fbc33fd0cd03e54602760ad27c","last_reissued_at":"2026-05-18T00:26:22.612719Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:26:22.612719Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1801.02721","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":"2026-05-18T00:26:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zHfXR70Q20yW7KG5Ozq+7vAP8rolj1zrS7YeQqgdRpqslhxtDUGCswnfcwVEdMgGrq07tf32R7yXRH9rPShkDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-11T10:01:32.822602Z"},"content_sha256":"ba0455bf2e4281480cde6cf3e9ee92513467bc2f66b0c86d9bd2d1e91166d2ad","schema_version":"1.0","event_id":"sha256:ba0455bf2e4281480cde6cf3e9ee92513467bc2f66b0c86d9bd2d1e91166d2ad"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:6HF3WCNWSH2RCLLGD35UOHO6TJ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Astronomy from Coast to Coast to Coast","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.IM","authors_text":"Eric Steinbring","submitted_at":"2018-01-08T23:34:33Z","abstract_excerpt":"Canada is a triangle-shaped country, roughly speaking. We all know that the Atlantic Ocean is at its eastern corner in the Maritimes, and off the west coast of British Columbia is the Pacific Ocean. The Arctic Ocean, however, makes up the bulk of Canada's coastline, along its pointy \"top.\" That peaks closest to the North Pole in Nunavut, on the shores of Ellesmere Island. Running down this island, as on our western flank in the Rockies, is a range of permanently snowcapped mountains, with one topping 2600 m. It is a propitious geography, which along with that of northern Greenland, provides pl"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1801.02721","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":"2026-05-18T00:26:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1epgNsVpoo2YoEsZ2KOjGFO+cmMoxOFq/KQhLcNjXn92BsSoayAbnxfD0PBynGRs57wzaVB6f/CSUy6rSyJGAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-11T10:01:32.823313Z"},"content_sha256":"172afca5a50587d094e9f4b96ba83160a3370968a25b58351fea2b992ecf95ec","schema_version":"1.0","event_id":"sha256:172afca5a50587d094e9f4b96ba83160a3370968a25b58351fea2b992ecf95ec"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/6HF3WCNWSH2RCLLGD35UOHO6TJ/bundle.json","state_url":"https://pith.science/pith/6HF3WCNWSH2RCLLGD35UOHO6TJ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/6HF3WCNWSH2RCLLGD35UOHO6TJ/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":"2026-06-11T10:01:32Z","links":{"resolver":"https://pith.science/pith/6HF3WCNWSH2RCLLGD35UOHO6TJ","bundle":"https://pith.science/pith/6HF3WCNWSH2RCLLGD35UOHO6TJ/bundle.json","state":"https://pith.science/pith/6HF3WCNWSH2RCLLGD35UOHO6TJ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/6HF3WCNWSH2RCLLGD35UOHO6TJ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:6HF3WCNWSH2RCLLGD35UOHO6TJ","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":"bba983ae34cd29a5cbe5e33f0c07c52a357aaa8f30ac6bf833b8fa5857f650b4","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-01-08T23:34:33Z","title_canon_sha256":"b1b03cd47f837a72975344954e752c9f2e2e541b7200bf5ecefe334e86d08214"},"schema_version":"1.0","source":{"id":"1801.02721","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1801.02721","created_at":"2026-05-18T00:26:22Z"},{"alias_kind":"arxiv_version","alias_value":"1801.02721v1","created_at":"2026-05-18T00:26:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1801.02721","created_at":"2026-05-18T00:26:22Z"},{"alias_kind":"pith_short_12","alias_value":"6HF3WCNWSH2R","created_at":"2026-05-18T12:32:08Z"},{"alias_kind":"pith_short_16","alias_value":"6HF3WCNWSH2RCLLG","created_at":"2026-05-18T12:32:08Z"},{"alias_kind":"pith_short_8","alias_value":"6HF3WCNW","created_at":"2026-05-18T12:32:08Z"}],"graph_snapshots":[{"event_id":"sha256:172afca5a50587d094e9f4b96ba83160a3370968a25b58351fea2b992ecf95ec","target":"graph","created_at":"2026-05-18T00:26:22Z","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":"Canada is a triangle-shaped country, roughly speaking. We all know that the Atlantic Ocean is at its eastern corner in the Maritimes, and off the west coast of British Columbia is the Pacific Ocean. The Arctic Ocean, however, makes up the bulk of Canada's coastline, along its pointy \"top.\" That peaks closest to the North Pole in Nunavut, on the shores of Ellesmere Island. Running down this island, as on our western flank in the Rockies, is a range of permanently snowcapped mountains, with one topping 2600 m. It is a propitious geography, which along with that of northern Greenland, provides pl","authors_text":"Eric Steinbring","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-01-08T23:34:33Z","title":"Astronomy from Coast to Coast to Coast"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1801.02721","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:ba0455bf2e4281480cde6cf3e9ee92513467bc2f66b0c86d9bd2d1e91166d2ad","target":"record","created_at":"2026-05-18T00:26:22Z","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":"bba983ae34cd29a5cbe5e33f0c07c52a357aaa8f30ac6bf833b8fa5857f650b4","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-01-08T23:34:33Z","title_canon_sha256":"b1b03cd47f837a72975344954e752c9f2e2e541b7200bf5ecefe334e86d08214"},"schema_version":"1.0","source":{"id":"1801.02721","kind":"arxiv","version":1}},"canonical_sha256":"f1cbbb09b691f5112d661efb471dde9a7159b4fbc33fd0cd03e54602760ad27c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f1cbbb09b691f5112d661efb471dde9a7159b4fbc33fd0cd03e54602760ad27c","first_computed_at":"2026-05-18T00:26:22.612719Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:26:22.612719Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"phUCswL6NpfWfXgMIEECnBBiSVRiz7vKVQPgzdSPqZ8Dor7cFRr+/+l+hYFy13vWDtGdHKGDSyhYn/0eS6gbAw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:26:22.613377Z","signed_message":"canonical_sha256_bytes"},"source_id":"1801.02721","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ba0455bf2e4281480cde6cf3e9ee92513467bc2f66b0c86d9bd2d1e91166d2ad","sha256:172afca5a50587d094e9f4b96ba83160a3370968a25b58351fea2b992ecf95ec"],"state_sha256":"a00394437a5d68567b0e4ca7b9c2b09a8cd0ce9180d43d8661b860ffc73316c3"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0+00R+UWlGKqINw1vpp9KkEMgmZzKXx12Pou/dZtn2wXZeClChpsZlibPNiF3nYoqqo7zjqDt/HNJeHzL5acDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-11T10:01:32.827208Z","bundle_sha256":"8b888dc0da05379d08fef0795a613eb54812b5dbdfe3f226dfdb170677a655fc"}}