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 0x8ff8cd3fce3a6fad7bc18b3346504691cab7a0d3c8d2a078302a6ebb8adf54d6. 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/af50b3f6-af28-47c0-be13-0cb806ea317c.json and https://artists.proofprofile.net/proofs/artist/af50b3f6-af28-47c0-be13-0cb806ea317c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x9f754945795ce55757bda2bfbb42e7177087dc69ac3499c98a8573aded454566. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199202504.
Polish National Radio Symphony Orchestra
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50f01f243dd7eef7e74e9985201f34867e8f7f7123e98c7d386d0465a385730f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199202511.
Great Composers in Words & Music: George Frideric Handel
Herz Und Mund Und Tat Und Leben, BWV 147: Chorale: Jesus Bleibet Meine Freude (Jesu, Joy Of Man's Desiring)
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81fe9b073c6199704b409bbfd2bead0959ed00c2782360726ef5f158a01788b4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199614109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x132f3fa8e26da5c9d8bc4fecce2517a20a05716db6965721c3c4381b8300a093. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199614112.
101 Classics - The Best Loved Classical Melodies
Lakmé: Blumenduett (Lara Croft Tomb Raider): Lakme, Act I: Dome epais, "Flower Duet"
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Flowering of Love, (The) - Beautiful Arias and Sacred Songs of the Baroque
Ave Maria - Les Plus Beaux Ave Maria Et Chants A La Vierge (The Most Beautiful Ave Marias and Songs To the Virgin)
Swan Lake, Op. 20, Act II No. 10: Scene, "Swan Theme"
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An der schonen, blauen Donau (The Beautiful Blue Danube), Op. 314
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Klassiska Favoriter (Classical Favourites)
Solomon, HWV 67: Arrival of the Queen of Sheba
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Symphony No. 5 in C Minor, Op. 67: I. Allegro con brio
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Overture (Suite) No. 3 in D Major, BWV 1068: Suite In D Major, No. 3: Air
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Peer Gynt: In the Hall of the Mountain King
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Overture (Suite) No. 2 in B Minor, BWV 1067: Suite No. 2 in B Minor, "Badinerie"
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Piano Sonata No. 14 in C-Sharp Minor, Op. 27, No. 2, "Moonlight": I. Adagio sostenuto
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda233c12a9cdc68c479c30eb2eddd6be6edc0c8ee36b4259c9da0c9259256371. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199314404.
Concerto in C Major, RV 443: Flautino Concerto No. 11 in C Major, RV 443: Largo
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Requiem in D Minor, K. 626: Sequence: VI. Lacrimosa dies illa
Slovak State Philharmonic Orchestra, Kosice
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x138d391e4eb2bba841138f6f4805adc9cd5aeb92f9e60915d0b57246f97854a0. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199314409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa09fc5baac630bd3874e50df1b9e7c8060cc1f4376f2a33715b97a33acb64e1c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199314412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde0f6e50ee26b56153c163ef6e71dbca057f4bddac0a82d71654bee43928d10. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199314417.
The Four Seasons: Violin Concerto in E Major, Op. 8, No. 1, RV 269, "Spring": I. Allegro
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Konzert für Oboe d-Moll: Oboe Concerto in D Minor: II. Adagio
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Suite für Orchester Nr. 3 D-Dur, BWV 1068: Overture (Suite) No. 3 in D Major, BWV 1068: II. Air, "Air on a G String"
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Sonata a 5 in G Minor, Op. 2, No. 6: I. Adagio
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Skona Grona Dagar (Beautiful Green Days)
Saints and Sinners - The Music of Medieval and Renaissance Europe
Art & Music: Caravaggio - Music of His Time
Handel: Dixit Dominus / Salve Regina / Nisi Dominus
The Indian Queen, Z. 630: First Music - First Aire
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The Indian Queen, Z. 630 : Act II - The Masque Of Fame And Envy: Symphony
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The Indian Queen, Z. 630 : Act III - Trumpet Overture
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The Indian Queen, Z. 630 : Act IV - Prelude And Song (Orazia): They Tell Us That Your Mighty Powers
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The Masque Of Hymen: The Last Act - Solo (Cupid): The Joys Of Wedlock
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Monteverdi: Vespers of the Blessed Virgin
Messiah, HWV 56: Part II: Hallelujah! (Chorus)
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Football Classics - Classical Music That Celebrates The Great Game (1998 Edition)
Symphony No. 9 In E Minor, Op. 95, B. 178, "From The New World": II. Largo
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Festgesang, MWV D4, "Gutenberg-Kantate": No. 2. (adap. W.H. Cummings as Hark! The Herald Angels Sing)
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Bach to Work: Classical Music for Work or Study
Herz und Mund und Tat und Leben, BWV 147: Jesu bleibet meine Freude
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Tudor and Stuart Spirit (Music for Dancing and Dreaming)