1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1c9e4e4e00c65f74891af28c3ca20d04d98088f10ba6c9d046962797e833cab. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3459ad83-e5ee-4b89-8c21-a4c7da40f58b.json and https://artists.proofprofile.net/proofs/artist/3459ad83-e5ee-4b89-8c21-a4c7da40f58b.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Barista Beats - Chill Lo-fi Tunes for the Perfect Brew
Barista Beats - バリスタが好むこだわりリラックスビート
Rainy Moods - Smooth Lo-fi with a Touch of Rain
Lo-fi Quiet Hours - 静かな夜に聴きたいおしゃれなラウンジBGM Vol.3
Rainy Reflections - 雨音に乗せる心地よいLo-fi Melody Vol.2
Rainy Reflections - Soothing Lo-fi Beats in Rainy Ambience Vol.2
Lo-fi Work Focus - Rhythms to Keep You in the Zone
Twilight Tones - Evening Lo-fi to Enhance Your Workflow
Twilight Tones - 夕暮れ時の作業がはかどる穏やかなLo-fiリズム
Pages & Peace: A Lo-fi Cafe - ゆったりした気持ちで楽しむ読書時間 Vol.2
Pages & Peace: Enjoy Relaxed Reading at the Lo-fi Café Vol.2
Productive Lo-fi - Chill Sounds for Focused Workflow Vol.2
Productive Lo-fi - 心地よく作業がはかどるChillサウンド Vol.2
Code & Chill Vibes - Midnight Beats for Coding Flow
At My Desk - Lo-fi to Keep You Productive
Twilight Tones - Evening Lo-fi to Enhance Your Workflow Vol.2
Twilight Tones - 夕暮れ時の作業がはかどる穏やかなLo-fiリズム Vol.2
Lo-fi Work Focus - 仕事の集中力を高めるおしゃれな音楽 Vol.2
Lo-fi Work Focus - Rhythms to Keep You in the Zone Vol.2
Chapters & Chords: Lo-fi for Leisure Reading Vol.2
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef4e5bb3fb1b5ed41b6f987dbde49644dd80e4ba2c687dc51a67138f02ab7f4c. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZAKB2500136 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3628e2103e1961b30d6b716c3979ed407472ad01a294d4cd4ed7dcce53f74109. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZAKB2500139 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcab4f78c763e81bdd23d34c040cf8a5f19a1d4da1465345a2af45ee9bb3abf1d. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZAKB2500145 — a six-check JSON result.
Coffeehouse Chill - Serene Lo-fi Vibes for Your Cafe Moments
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f0a8d0d377abeed0bf8625397ba9237515b6137d30a53b188bce361dbe8771. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZAKB2500151 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x738689f456bc13682554756def265f6fb9efcd6915c2bc10c17323ca3d17ff84. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZAKB2500154 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eb2dcff8ec6df1550d884bf78bce23c82dc7860d6c755d11cbc238b0282b6a4. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZAKB2500157 — a six-check JSON result.
Books & Café BGM - The Essence of Coffeehouse Vibes Vol.2
Lo-fi Book Cafe - おしゃれな本屋さんで流れるBGM Vol.2
Lo-fi Book Cafe - Melodies for Trendy Reading Spaces Vol.2
Study Sessions - 勉強にしっかり集中できるLo-fiサウンド Vol.2
Study Sessions - Lo-fi Sounds for Maximum Concentration Vol.2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd00464d15adbdeefec683726c7e08fa3e59028e023102bf7fad2d96427dea2db. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZAKB2500225 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca3defe211bc9353f0eb71906660d3ee1161ff9800fb17be5c6336e0a8ee93c. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZAKB2500229 — a six-check JSON result.
Lo-fi Cozy Beats - Smooth Vibes for Focused Work Vol.2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x691f4b32c20865c247bd440867c233e97dbab21949073735a3e87abbf9d1a69b. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZAKB2500221 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x600d2095e7b245c0d4fa356b221d1275fb2fd3243b2e14c64286a07c24c81460. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZAKB2500222 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a15c13dce519fe362478a128c461d7c8320240e9d792fe0d84740f67897cc80. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZAKB2500227 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c4e1947d4398158ddf07c81d48f9ecf6e89250f084bc6cc34336eff432e7da9. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZAKB2500228 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca3defe211bc9353f0eb71906660d3ee1161ff9800fb17be5c6336e0a8ee93c. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZAKB2500229 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3a8ae7eb3cffee4edab4e13add70d273069dd260085da0bd101060f1b11f6bf. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZAKB2500230 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7048770294f9e1d17b98d9fd4747133d4df79442c68de8891e1f14aec16a1cbc. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZAKB2500266 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa38522370b6fc372b5c204bfafb8d715fa7619bb0486312fd61e46c406a6adc8. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZAKB2500268 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7048770294f9e1d17b98d9fd4747133d4df79442c68de8891e1f14aec16a1cbc. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZAKB2500266 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21673587bf2b354f89e1dcbff417477390c0176526ac33c05876a689a7a4cb3d. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZAKB2500267 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa38522370b6fc372b5c204bfafb8d715fa7619bb0486312fd61e46c406a6adc8. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZAKB2500268 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dfcff2f431bcea27eb5c95322c13ced1145ff5c3eed73a08034e67ebb86c8bc. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZAKB2500271 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa56f5405a29381e3589dc8f0f6bc502e65231c74b53055b0bbdaa9498e48c70e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZAKB2500272 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36640e8e69be952e0ec04d8d3fe9b96654baaaffb19b467f3cd7b5063837c466. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZAKB2500280 — a six-check JSON result.
Morning Dew Beats: Soft Lo-fi to Brighten Your Day Vol.3
Morning Dew Beats - 目覚めを優しく彩るLo-fiチル Vol.3
Herbal Tea Harmony-ハーブティーと共に楽しむLo-fi Beats Vol.3
Herbal Tea Harmony - Lo-fi Sounds to Sip and Unwind Vol.3
Lunar Lo-fi Lullabies: Peaceful Lo-fi Under the Moon Vol.3
Learning Loops: Lo-fi Beats for Productive Study Vo.2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb43b5e9196b363ca68180be9682e503c624e889baa590bd487599b39f29dc2bc. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZAKB2500311 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc1996ce9bf908d365ac6a09a637dc8f2f07be98d943793f55a11e3ab580d00. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZAKB2500317 — a six-check JSON result.
Lunar Lo-fi Lullabies - 月夜に響く優しい子守唄 Vol.3
Morning Dew Beats - 目覚めを優しく彩るLo-fiチル Vol.4
Morning Dew Beats: Soft Lo-fi to Brighten Your Day Vol.4
Night Whisper Melodies - 寝る前のゆったりLo-fi Beats Vol.4
Night Whisper Melodies - Lo-fi Beats to Drift You to Sleep Vol. 4
Lo-fi Chill Lullaby - Stylish and Gentle Mood in the Night Vol.6
Lo-fi Chill Lullaby - 大人のためのおしゃれで優しい子守歌 Vol.6
Cafe Twilight Tunes-夕暮れ時のカフェミュージック Vol.2
Morning Roast - Warm Melodies for Morning Coffee Vibes
Sunday Brunch Vibes - Laid-back Rhythms for Slow, Sunny Sundays
Café Mocha Beats - Lo-fi Tunes to Savor with the Scent of Mocha
Latte & Lo-fi - Laid-back Sounds for a Soothing cafe Atmosphere
Latte & Lo-fi - 心地よいカフェタイムのチルサウンド
Twilight Calm Beats - Serene Sounds for a Peaceful Sunset
Afternoon Coffee Break - Soft Lo-fi to Ease Your Mind During Coffee Time
Afternoon Coffee Break - 仕事の合間に聴くリラックスBGM
Nocturnal Chill - Gentle Beats for Midnight Unwinding
Nightfall Harmony - Calm Grooves for the Twilight Hour
Midnight Breeze - Lo-fi Sounds on a Midnight Wind
Cafe Window Reflections - 窓際で聴く穏やかなLo-fi
Cafe Window Reflections - Chill Sounds for a View Outside
Brunch Beats - Mellow Sounds for Sunny Brunch Hours
Sundown Café Vibes: Relaxing Tunes at Sunset Hour
Night Whisper Melodies - 寝る前のゆったりLo-fi Beats Vol.5
Night Whisper Melodies - Lo-fi Beats to Drift You to Sleep Vol. 5
Sleepy Sky Lo-fi - Lo-fi Sounds to Lull You to Sleep
Afternoon Slumber: Lo-fi to Nap the Day Away
Herbal Tea Harmony - ハーブティーと共に楽しむLo-fi Beats Vol.4
Cafe Twilight Tunes -夕暮れ時のカフェミュージック Vol.3
Morning Dew Beats - 目覚めを優しく彩るLo-fiチル Vol.5
Morning Dew Beats: Soft Lo-fi to Brighten Your Day Vol.5
Lo-fi Sunday Chill ～日曜日をまったりくつろぐ音楽～ Vol.5
Lo-fi Sunday Chill: Weekend Relaxation Music Vol.5
Lunchtime Lo-fi Vibes - ランチタイムのリラックスビート Vol.4
Lunchtime Lo-fi Vibes - Soothing Rhythms for a Midday Break Vol.4
Nocturnal Notes - Relaxed Lo-fi Beats for Sleep Vol.5
Rainy Day Café - Cozy Lo-fi with Falling Rain
Late Lunch Lo-fi - Laid-back Beats for the Afternoon
Lazy Day Beats - Mellow Music for a Peaceful Day
Dreamy Day Drift: Chill Beats for a Peaceful Afternoon
Bakery Morning Beats: Relaxing Rhythms for Toast & Coffee
Nap Time Echoes: Chill Music to Doze Off With
Morning Dew Beats-目覚めを優しく彩るLo-fiチル Vol.6
Morning Dew Beats: Soft Lo-fi to Brighten Your Day Vol.6
Herbal Tea Harmony-ハーブティーと共に楽しむLo-fi Beats Vol.5
Herbal Tea Harmony - Lo-fi Sounds to Sip and Unwind Vol.5
Cafe Twilight Tunes-夕暮れ時のカフェミュージック Vol.4
Golden Hour Café: Lo-fi for Sunset Coffee Moments
Golden Hour Café - 夕焼けのカフェタイムのLo-fi Rhythm
Parisian Café Nights: Music for a Nighttime Espresso
Warm Chai Melodies: Lo-fi to Sip and Unwind
Siesta Rhythms - お昼寝時間にぴったりなLo-fiサウンド Vol.2
Siesta Rhythms: Lo-fi to Sink Into Afternoon Sleep Vol.2
Daydream Lo-fi: Soft Beats for Dreamy Moments
Siesta Serenity: Dreamy Vibes for Lazy Hours
Cloud Drift Beats: Chill Sounds for Floating Through the Day
Tea Time Echoes - Lo-fi Bliss for a Quiet Tea Break Vol.2
Tea Time Echoes - 紅茶の時間にぴったりなLo-fi Rhythm Vol.2
Sleep Lo-fi Wave - Lo-fi Chillout for Sleep Vol.7
Nap Time Echoes: Chill Music to Doze Off With Vol.2
Afternoon Slumber: Lo-fi to Nap the Day Away Vol.2
Dreamy Day Drift - 穏やかな昼下がりに聴くチルビート Vol.2
Dreamy Day Drift: Chill Beats for a Peaceful Afternoon Vol.2
Lo-fi Sleep Waves: Gentle Rhythms for Dreamy Nights Vol.6
Deep Sleep Rhythms: Soothing Sounds for Deep Slumber
Velvet Night Beats - 深夜にやさしく流れるLo-fi Vol.2
Velvet Night Beats - Dreamy Lo-fi for Late-Night Calm Vol.2
Serene Nightfall: Peaceful Beats for Evening Relaxation Vol.2
Golden Nap Vibes - Lo-fi for a Dreamy Afternoon Vol.2
Quiet Reading Beats - The Perfect Lo-fi for Peaceful Page-Turning Vol.5
Quiet Reading Beats - 静かな読書にぴったりなLo-fi Vol.5