{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:A75PTMOJOYUFDVOGZOR5TDW5XL","short_pith_number":"pith:A75PTMOJ","canonical_record":{"source":{"id":"2509.08337","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"cs.IR","submitted_at":"2025-09-10T07:21:55Z","cross_cats_sorted":[],"title_canon_sha256":"900daa3609a9a2c615d009e8918dec2dc09046934d4e3d2af83520566f15fdfd","abstract_canon_sha256":"185f625816d74522082a8764188093e39e70597031199bd5d92eec043c50de10"},"schema_version":"1.0"},"canonical_sha256":"07faf9b1c9762851d5c6cba3d98eddbaeff393327ec607becbb89954a961774c","source":{"kind":"arxiv","id":"2509.08337","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2509.08337","created_at":"2026-07-05T12:08:28Z"},{"alias_kind":"arxiv_version","alias_value":"2509.08337v1","created_at":"2026-07-05T12:08:28Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2509.08337","created_at":"2026-07-05T12:08:28Z"},{"alias_kind":"pith_short_12","alias_value":"A75PTMOJOYUF","created_at":"2026-07-05T12:08:28Z"},{"alias_kind":"pith_short_16","alias_value":"A75PTMOJOYUFDVOG","created_at":"2026-07-05T12:08:28Z"},{"alias_kind":"pith_short_8","alias_value":"A75PTMOJ","created_at":"2026-07-05T12:08:28Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:A75PTMOJOYUFDVOGZOR5TDW5XL","target":"record","payload":{"canonical_record":{"source":{"id":"2509.08337","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"cs.IR","submitted_at":"2025-09-10T07:21:55Z","cross_cats_sorted":[],"title_canon_sha256":"900daa3609a9a2c615d009e8918dec2dc09046934d4e3d2af83520566f15fdfd","abstract_canon_sha256":"185f625816d74522082a8764188093e39e70597031199bd5d92eec043c50de10"},"schema_version":"1.0"},"canonical_sha256":"07faf9b1c9762851d5c6cba3d98eddbaeff393327ec607becbb89954a961774c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T12:08:28.023868Z","signature_b64":"My178ntURIAMHiA7PGCq0+NinIByXNG6GSzxjCtDPp8G4PbHorhV+rNJ5lVoxkXT/1MeYgCu3PcUgmnrE7fYAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"07faf9b1c9762851d5c6cba3d98eddbaeff393327ec607becbb89954a961774c","last_reissued_at":"2026-07-05T12:08:28.023419Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T12:08:28.023419Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2509.08337","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":"2026-07-05T12:08:28Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tyS40ZghpbXjtDQ5jAM0oXSYIhL3wZ1xauccNzylbITE4ljfIDML2YAFge/5UYqjKUlNFV+VgXrWSkWcaHJnAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-20T18:13:18.837652Z"},"content_sha256":"fccc2f83732494932bf91707929da0aeac9360cbd52a1f50566bb81eedb0b8ee","schema_version":"1.0","event_id":"sha256:fccc2f83732494932bf91707929da0aeac9360cbd52a1f50566bb81eedb0b8ee"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:A75PTMOJOYUFDVOGZOR5TDW5XL","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Soundtracks of Our Lives: How Age Influences Musical Preferences","license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","headline":"","cross_cats":[],"primary_cat":"cs.IR","authors_text":"Alan Said, Arsen Matej Golubovikj, Bruce Ferwerda, Marko Tal\\v{c}i\\v{c}","submitted_at":"2025-09-10T07:21:55Z","abstract_excerpt":"The majority of research in recommender systems, be it algorithmic improvements, context-awareness, explainability, or other areas, evaluates these systems on datasets that capture user interaction over a relatively limited time span. However, recommender systems can very well be used continuously for extended time. Similarly so, user behavior may evolve over that extended time. Although media studies and psychology offer a wealth of research on the evolution of user preferences and behavior as individuals age, there has been scant research in this regard within the realm of user modeling and "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2509.08337","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/2509.08337/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":"2026-07-05T12:08:28Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mMfMOoVQT9Pfi+nsnIXsWQUyUgyD4PoS6YJrU7ZkBw/ysRPXA4EUpBLYg5A6cCayT0UKEZ6T31soAYyNE1ueCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-20T18:13:18.838020Z"},"content_sha256":"f8fb93afbafe33447f0a927dcec273a4c3724cccc141260df0a74c3b98ef92cc","schema_version":"1.0","event_id":"sha256:f8fb93afbafe33447f0a927dcec273a4c3724cccc141260df0a74c3b98ef92cc"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/A75PTMOJOYUFDVOGZOR5TDW5XL/bundle.json","state_url":"https://pith.science/pith/A75PTMOJOYUFDVOGZOR5TDW5XL/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/A75PTMOJOYUFDVOGZOR5TDW5XL/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":"2026-07-20T18:13:18Z","links":{"resolver":"https://pith.science/pith/A75PTMOJOYUFDVOGZOR5TDW5XL","bundle":"https://pith.science/pith/A75PTMOJOYUFDVOGZOR5TDW5XL/bundle.json","state":"https://pith.science/pith/A75PTMOJOYUFDVOGZOR5TDW5XL/state.json","well_known_bundle":"https://pith.science/.well-known/pith/A75PTMOJOYUFDVOGZOR5TDW5XL/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:A75PTMOJOYUFDVOGZOR5TDW5XL","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":"185f625816d74522082a8764188093e39e70597031199bd5d92eec043c50de10","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"cs.IR","submitted_at":"2025-09-10T07:21:55Z","title_canon_sha256":"900daa3609a9a2c615d009e8918dec2dc09046934d4e3d2af83520566f15fdfd"},"schema_version":"1.0","source":{"id":"2509.08337","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2509.08337","created_at":"2026-07-05T12:08:28Z"},{"alias_kind":"arxiv_version","alias_value":"2509.08337v1","created_at":"2026-07-05T12:08:28Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2509.08337","created_at":"2026-07-05T12:08:28Z"},{"alias_kind":"pith_short_12","alias_value":"A75PTMOJOYUF","created_at":"2026-07-05T12:08:28Z"},{"alias_kind":"pith_short_16","alias_value":"A75PTMOJOYUFDVOG","created_at":"2026-07-05T12:08:28Z"},{"alias_kind":"pith_short_8","alias_value":"A75PTMOJ","created_at":"2026-07-05T12:08:28Z"}],"graph_snapshots":[{"event_id":"sha256:f8fb93afbafe33447f0a927dcec273a4c3724cccc141260df0a74c3b98ef92cc","target":"graph","created_at":"2026-07-05T12:08:28Z","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/2509.08337/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The majority of research in recommender systems, be it algorithmic improvements, context-awareness, explainability, or other areas, evaluates these systems on datasets that capture user interaction over a relatively limited time span. However, recommender systems can very well be used continuously for extended time. Similarly so, user behavior may evolve over that extended time. Although media studies and psychology offer a wealth of research on the evolution of user preferences and behavior as individuals age, there has been scant research in this regard within the realm of user modeling and ","authors_text":"Alan Said, Arsen Matej Golubovikj, Bruce Ferwerda, Marko Tal\\v{c}i\\v{c}","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"cs.IR","submitted_at":"2025-09-10T07:21:55Z","title":"Soundtracks of Our Lives: How Age Influences Musical Preferences"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2509.08337","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:fccc2f83732494932bf91707929da0aeac9360cbd52a1f50566bb81eedb0b8ee","target":"record","created_at":"2026-07-05T12:08:28Z","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":"185f625816d74522082a8764188093e39e70597031199bd5d92eec043c50de10","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"cs.IR","submitted_at":"2025-09-10T07:21:55Z","title_canon_sha256":"900daa3609a9a2c615d009e8918dec2dc09046934d4e3d2af83520566f15fdfd"},"schema_version":"1.0","source":{"id":"2509.08337","kind":"arxiv","version":1}},"canonical_sha256":"07faf9b1c9762851d5c6cba3d98eddbaeff393327ec607becbb89954a961774c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"07faf9b1c9762851d5c6cba3d98eddbaeff393327ec607becbb89954a961774c","first_computed_at":"2026-07-05T12:08:28.023419Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T12:08:28.023419Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"My178ntURIAMHiA7PGCq0+NinIByXNG6GSzxjCtDPp8G4PbHorhV+rNJ5lVoxkXT/1MeYgCu3PcUgmnrE7fYAw==","signature_status":"signed_v1","signed_at":"2026-07-05T12:08:28.023868Z","signed_message":"canonical_sha256_bytes"},"source_id":"2509.08337","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:fccc2f83732494932bf91707929da0aeac9360cbd52a1f50566bb81eedb0b8ee","sha256:f8fb93afbafe33447f0a927dcec273a4c3724cccc141260df0a74c3b98ef92cc"],"state_sha256":"28e77a4bae3e8bfaae39121131be7f9a67c7a7c32aa98ff897dfaccb31be8de8"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mgIzLWEsOB5JDQ/+i4Hxh5vvmDvYrLrDOyx53BrXHLAXJqwcMrO3RrLQURAhAusWH989/DtHwidBXAb1QNzZDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-20T18:13:18.840109Z","bundle_sha256":"66579f06d25558ad2d077406ef9a724843d1c5515979fc9c57482132042eeea5"}}