{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:D4MHHJO6XZXOVVFMZWZP4Q3KGC","short_pith_number":"pith:D4MHHJO6","canonical_record":{"source":{"id":"1507.04135","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2015-07-15T09:13:03Z","cross_cats_sorted":[],"title_canon_sha256":"6ba34ad51cedfa257719fbb09919bdf70f1d99b528d282131680e8c7329c8fc4","abstract_canon_sha256":"dc798b63caa6890ae85d5f4c14664a432a659eb3aa2455affad00012275ccd8c"},"schema_version":"1.0"},"canonical_sha256":"1f1873a5debe6eead4accdb2fe436a309f53b15384e1d9173bccc7047af75aaf","source":{"kind":"arxiv","id":"1507.04135","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1507.04135","created_at":"2026-05-18T01:36:49Z"},{"alias_kind":"arxiv_version","alias_value":"1507.04135v1","created_at":"2026-05-18T01:36:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1507.04135","created_at":"2026-05-18T01:36:49Z"},{"alias_kind":"pith_short_12","alias_value":"D4MHHJO6XZXO","created_at":"2026-05-18T12:29:17Z"},{"alias_kind":"pith_short_16","alias_value":"D4MHHJO6XZXOVVFM","created_at":"2026-05-18T12:29:17Z"},{"alias_kind":"pith_short_8","alias_value":"D4MHHJO6","created_at":"2026-05-18T12:29:17Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:D4MHHJO6XZXOVVFMZWZP4Q3KGC","target":"record","payload":{"canonical_record":{"source":{"id":"1507.04135","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2015-07-15T09:13:03Z","cross_cats_sorted":[],"title_canon_sha256":"6ba34ad51cedfa257719fbb09919bdf70f1d99b528d282131680e8c7329c8fc4","abstract_canon_sha256":"dc798b63caa6890ae85d5f4c14664a432a659eb3aa2455affad00012275ccd8c"},"schema_version":"1.0"},"canonical_sha256":"1f1873a5debe6eead4accdb2fe436a309f53b15384e1d9173bccc7047af75aaf","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:36:49.037204Z","signature_b64":"uKZb2WHwEFbNKXeu/fi6MKawV3GnitWXpQRCp6LQcjlULjyBcBZsSY7xVPQu0LjNbfpUOhhoYHh9xi4wYmW2DA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1f1873a5debe6eead4accdb2fe436a309f53b15384e1d9173bccc7047af75aaf","last_reissued_at":"2026-05-18T01:36:49.036504Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:36:49.036504Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1507.04135","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":"2026-05-18T01:36:49Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"fxQMhVkQ5WJt/lzZ+CXIEleSvq8Q96yw8k64RueawPhEFUXrNkN8A3v5YhukQiydI5UmFZOkSrLdH+/qihIUDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T22:26:18.616381Z"},"content_sha256":"31d8adf4efb40f00bf9a212440d75b981b179dce58f2a8e24aec60d0be8d7818","schema_version":"1.0","event_id":"sha256:31d8adf4efb40f00bf9a212440d75b981b179dce58f2a8e24aec60d0be8d7818"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:D4MHHJO6XZXOVVFMZWZP4Q3KGC","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Frequency and time transfer for metrology and beyond using telecommunication network fibres","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.optics","authors_text":"Adil Haboucha (LNE-SYRTE), Amale Kanj (LPL), Anne Amy-Klein (LPL), Anthony Bercy (LPL, Bruno Chanteau (LPL), Christian Chardonnet (LPL), Daniele Rovera (LNE-SYRTE), Fabien K\\'ef\\'elian (LPL), Fabio Stefani (LPL, Giorgio Santarelli (LP2N), Haifeng Jiang (LNE-SYRTE), Joseph Achkar (LNE-SYRTE), LNE-SYRTE), Olivier Lopez (LPL), Paul-Eric Pottie (LNE-SYRTE)","submitted_at":"2015-07-15T09:13:03Z","abstract_excerpt":"The distribution and the comparison of an ultra-stable optical frequency and accurate time using optical fibres have been greatly improved in the last ten years. The frequency stability and accuracy of optical links surpass well-established methods using the global navigation satellite system and geostationary satellites. In this paper, we present a review of the methods and the results obtained. We show that public telecommunication network carrying Internet data can be used to compare and distribute ultra-stable metrological signals over long distances. This novel technique paves the way for"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1507.04135","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":"2026-05-18T01:36:49Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"sIqtFv83EKoOtieG1bD8+2M6Wpq3yIGC6mL7ps2/HemQzyoOyWZccdQU2Oo3F2G/whLkktzocxl2GVIaOyZbBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T22:26:18.617043Z"},"content_sha256":"d1878ab3a7492070667be352e4f9163b3f1176f13d82de537b49cae8cdf6b766","schema_version":"1.0","event_id":"sha256:d1878ab3a7492070667be352e4f9163b3f1176f13d82de537b49cae8cdf6b766"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/D4MHHJO6XZXOVVFMZWZP4Q3KGC/bundle.json","state_url":"https://pith.science/pith/D4MHHJO6XZXOVVFMZWZP4Q3KGC/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/D4MHHJO6XZXOVVFMZWZP4Q3KGC/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":"2026-05-30T22:26:18Z","links":{"resolver":"https://pith.science/pith/D4MHHJO6XZXOVVFMZWZP4Q3KGC","bundle":"https://pith.science/pith/D4MHHJO6XZXOVVFMZWZP4Q3KGC/bundle.json","state":"https://pith.science/pith/D4MHHJO6XZXOVVFMZWZP4Q3KGC/state.json","well_known_bundle":"https://pith.science/.well-known/pith/D4MHHJO6XZXOVVFMZWZP4Q3KGC/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:D4MHHJO6XZXOVVFMZWZP4Q3KGC","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":"dc798b63caa6890ae85d5f4c14664a432a659eb3aa2455affad00012275ccd8c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2015-07-15T09:13:03Z","title_canon_sha256":"6ba34ad51cedfa257719fbb09919bdf70f1d99b528d282131680e8c7329c8fc4"},"schema_version":"1.0","source":{"id":"1507.04135","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1507.04135","created_at":"2026-05-18T01:36:49Z"},{"alias_kind":"arxiv_version","alias_value":"1507.04135v1","created_at":"2026-05-18T01:36:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1507.04135","created_at":"2026-05-18T01:36:49Z"},{"alias_kind":"pith_short_12","alias_value":"D4MHHJO6XZXO","created_at":"2026-05-18T12:29:17Z"},{"alias_kind":"pith_short_16","alias_value":"D4MHHJO6XZXOVVFM","created_at":"2026-05-18T12:29:17Z"},{"alias_kind":"pith_short_8","alias_value":"D4MHHJO6","created_at":"2026-05-18T12:29:17Z"}],"graph_snapshots":[{"event_id":"sha256:d1878ab3a7492070667be352e4f9163b3f1176f13d82de537b49cae8cdf6b766","target":"graph","created_at":"2026-05-18T01:36:49Z","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 distribution and the comparison of an ultra-stable optical frequency and accurate time using optical fibres have been greatly improved in the last ten years. The frequency stability and accuracy of optical links surpass well-established methods using the global navigation satellite system and geostationary satellites. In this paper, we present a review of the methods and the results obtained. We show that public telecommunication network carrying Internet data can be used to compare and distribute ultra-stable metrological signals over long distances. This novel technique paves the way for","authors_text":"Adil Haboucha (LNE-SYRTE), Amale Kanj (LPL), Anne Amy-Klein (LPL), Anthony Bercy (LPL, Bruno Chanteau (LPL), Christian Chardonnet (LPL), Daniele Rovera (LNE-SYRTE), Fabien K\\'ef\\'elian (LPL), Fabio Stefani (LPL, Giorgio Santarelli (LP2N), Haifeng Jiang (LNE-SYRTE), Joseph Achkar (LNE-SYRTE), LNE-SYRTE), Olivier Lopez (LPL), Paul-Eric Pottie (LNE-SYRTE)","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2015-07-15T09:13:03Z","title":"Frequency and time transfer for metrology and beyond using telecommunication network fibres"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1507.04135","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":"sha256:31d8adf4efb40f00bf9a212440d75b981b179dce58f2a8e24aec60d0be8d7818","target":"record","created_at":"2026-05-18T01:36:49Z","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":"dc798b63caa6890ae85d5f4c14664a432a659eb3aa2455affad00012275ccd8c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2015-07-15T09:13:03Z","title_canon_sha256":"6ba34ad51cedfa257719fbb09919bdf70f1d99b528d282131680e8c7329c8fc4"},"schema_version":"1.0","source":{"id":"1507.04135","kind":"arxiv","version":1}},"canonical_sha256":"1f1873a5debe6eead4accdb2fe436a309f53b15384e1d9173bccc7047af75aaf","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1f1873a5debe6eead4accdb2fe436a309f53b15384e1d9173bccc7047af75aaf","first_computed_at":"2026-05-18T01:36:49.036504Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:36:49.036504Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"uKZb2WHwEFbNKXeu/fi6MKawV3GnitWXpQRCp6LQcjlULjyBcBZsSY7xVPQu0LjNbfpUOhhoYHh9xi4wYmW2DA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:36:49.037204Z","signed_message":"canonical_sha256_bytes"},"source_id":"1507.04135","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:31d8adf4efb40f00bf9a212440d75b981b179dce58f2a8e24aec60d0be8d7818","sha256:d1878ab3a7492070667be352e4f9163b3f1176f13d82de537b49cae8cdf6b766"],"state_sha256":"0bcbf77f95a2cda5c4d2d0a8476bee01b5c3037786177fa5d23f6f971a4737d0"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"h7NAwctPXBQkTGF3ZZNFEh/Gx3a+C9I/4VbleY60tkQaUulmwoRj8Zt747UMIMIOkohakrh036L3dRdwOvSUCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T22:26:18.620717Z","bundle_sha256":"357de179842cad7f12274941a4f728048419cd5c8264ec255a81dc07c2f317ce"}}