1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ed14d31b11a41b92a7a309b608c7fc4686c09ecc5152c6a576f4f4bc030423c. 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/7d709621-8689-4eae-a213-d04c90c8fd33.json and https://artists.proofprofile.net/proofs/artist/7d709621-8689-4eae-a213-d04c90c8fd33.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Air Piano Variation (From Orchestral Suite No. 3, BWV 1068, Arr. for Piano by Svetoslav Karparov)
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 → block OTSBitcoinBlock must exist at that height 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7714ce52b3007195fc96a48a5d2755e15c970da5820288a5085a90611384bf01. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/DEE862400066.
Ode to Joy Piano Variation (From Symphony No. 9, Op. 125, Arr. for Piano by Svetoslav Karparov)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1fed5f4955843c2f5322daebd824e3c445d109714a2aee140323a9ff2e46bd3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEE862201078.
Wiegenlied Variation (From Fünf Lieder, Op. 49, Arr. for Piano by Svetoslav Karparov)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52307808c3cf8f96198736d6ebe7dc8fa9ee3487271b5deaeb637bc150153cfd. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE862300116.
Moonlight Sonata Variation (From Piano Sonata No. 14, Op. 27, Arr. by Svetoslav Karparov)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc3e809874327bfbe1a458098c7dc12b79d6a776d375c9bfc4d9edfc0563a911. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEE862300345.
Ave Maria Variation (From Méditation sur le Premier Prélude de Piano de Bach, CG 89, Arr. for Piano and Violin by Svetoslav Karparov)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca042ad83f39e0a12c2c7fe769a98c5b3734f744111cfeb7632b8a664023f6f7. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE862300359.
Canon in D Variation (From Canon in D Major, P. 37/T. 337, Arr. for Piano and Violin by Svetoslav Karparov)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x245dd7ad71268554e548c6fadb817f69942bb40b0bb9f3b473a36eb41a67ed44. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/DEE862300365.
Mozart Lacrimosa Variation (From Requiem, K. 626, Arr. for Piano and Cello by Svetoslav Karparov)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bf047921ded6bab95503849d245492cb785ed85eb19e174e0e2301f02d3785c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE862300353.
Morning Mood Variation (From Peer Gynt Suite No. 1, Op. 46, Arr. for Piano by Svetoslav Karparov)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ff898e440669ef1bb81899d64ebeadeaaab18368e4227dac18b25e1a8d7fbde. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEE862201062.
Adagio Variation (From Adagio in G Minor, Arr. for Violin and Piano by Svetoslav Karparov)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67380a3da4f48428df75baa0fb5df8b7e6b479ce188e96724d36e51ab2396edb. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE862201001.
Mozart Symphony 40 Variation (From Symphony No. 40, K. 550, Arr. for Piano by Svetoslav Karparov)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c95458d16e905bae4d2120814c96b85657993043c77f78a57b0be0c29eec880. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEE862300332.
Eine Kleine Nachtmusik Variation (From Serenade No. 13, K. 525, Arr. for Piano by Svetoslav Karparov)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x724dc410774e03ff1889462f3f862ac74f5345629b9f106bbd3550a2e338515a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE862300118.
Air Variation (From Orchestral Suite No. 3, BWV 1068, Arr. for Piano and Cello by Svetoslav Karparov)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e2ee327382ac88d802ffa1a78f0cc2b9dcd49683ff6068306442c94bf0afacd. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE862201072.
Für Elise Variation (From Bagatelle in A Minor, WoO 59, Arr. by Svetoslav Karparov)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc58a0dca5a4ab35273e22132ef5fb5a27e7b59837622627113da86d5368f7d5. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE862300349.
Beethoven's Fifth Variation (From Symphony No. 5, Op. 67, Arr. for Piano by Svetoslav Karparov)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6556343585da9587e4187595252fce9fd6f355da874801b5a6608dc5085acfff. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE862300355.
Walkürenritt (From The Valkyrie, WWV 86b, Arr. for Piano by Svetoslav Karparov)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab8d3dd9052526db88e3c053efdbd1858e0bba6afe66915039d8eabe8c12dc0d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE862300347.
Aria Variation (From Goldberg Variations, BWV 988, Arr. for Piano by Svetoslav Karparov)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x839f778fad5c2bcb2ae648b070b54d0647060f690a42a75cdf33cf8ac9da0b74. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEE862300120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2661f522bfe471dfce4b028e05e186d31104a3c857079240523559fa929fc01f. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DEE862500242.
Mahler Adagietto Variation (From Symphony No. 5 in C-Sharp Minor, Arr. for Violin and Piano by Jan-Peter Klöpfel)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x786e4511a5e390ea059defb41bbcd25b136b9c0b386845de30c2a8d5aa2829c9. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DEE862401087.
Mozart Lullaby Variation (From Wiegenlied, K. 350, Arr. for Piano by Jan-Peter Klöpfel)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fc8b101dce234cc3dd2c5c4a46b4d5f0d2f7cc0f9fac35a5a9602c5d6a1749a. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE862400431.
Mozart Zauberflöte Lullaby (From Die Zauberflöte, K. 620: Der Vogelfänger bin ich ja, Arr. for Piano by Jan-Peter Klöpfel)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eaca1d7372f2e604986aeaecf42cdc3e5a652e799817d76e48131e8fa6e153a. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE862401105.
Mendelssohn Variation (From Violin Concerto, Op.64/ MWV O14, Arr. for Piano by Jan-Peter Klöpfel)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x957b21131b4df3c21d0ea8ae1d02a354aed9b5d9726350292212a6b83972716f. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE862400447.
Dvorák Serenade Piano Variation (From Serenade for Strings, Op. 22, Arr. for Piano by Jan-Peter Klöpfel)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4919db9a610a9e06051a8c7fd526a82ef8d8d57773d7505d07afb044e6867c07. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE862401107.
Wagner Rheingold Vorspiel Variation (From Rheingold, WWV 86a, Arr. for 2 Pianos by Jan-Peter Klöpfel)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfd8a5298f175d85b97983668b45c9f0bb6a597220d0bab6f0021be5026d2f14. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE862401089.
Fauré Après Un Rêve Piano Variation (From 3 Songs, Op. 7, Arr. for Piano by Jan-Peter Klöpfel)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95134640e988d6c656664829b0b254a33c751637daf37f0d48b3ef1f851e9d9f. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE862401091.
Rachmaninov Preghiera Piano Variation (From Piano Concerto No. 2, Op. 18, Arr. for Piano by Jan-Peter Klöpfel)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7fcd392a2d5599a6362f1eec37b666bbc639e6892d4fbc668763a5ea3e9892a. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE862401109.
Puccini Tosca Te Deum Variation (From Tosca, H.146, Arr. for 2 Pianos by Tim Allhoff)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c05728bd1043be5b124692473d353cab5a54ee7b1ffedc038838e412186ef76. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE862401095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3025567c5bb191c6994813f6504a188ddfd8848dc6ff4d33ec3446d720b20b6. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE862500240.
Vocalise Piano Variation (From Romances, Op. 34, No. 14, Arr. for Piano by Jan-Peter Klöpfel)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f0fccafab40a3a061cbd4551ad879adf2c3ebbc79c9073e2a9142b7a534b7d5. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE862400436.
Bach Ouverture Piano Variation (From Orchestral Suite No. 2 in B Minor, BWV 1067, Arr. for Piano by Jan-Peter Klöpfel)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed4586d4291aaab47a5b2c6f3a9d375637bc94a70bb10de8ac5a081060df15bb. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE862401099.
Tchaikovsky: Swan Lake Piano Variation (From Swan Lake, Op. 20a, Arr. for Piano by Jan-Peter Klöpfel)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27906e7e3b42f0b16938c9a571dbe777ca4fdd4782684c75969439ceb9071b04. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE862401101.
Shostakovich Jazz Waltz Piano Variation (From Jazz Suite No.2, Arr. for Piano by Jan-Peter Klöpfel)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b4da2dd97d6c5528d7ae079ff15400de50f5d8b32eb2b10f7c7cd7f58eca2af. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/DEE862401111.
Debussy Sunken Cathedral Variation (From Préludes, CD 125/L. 117, No. 10, Arr. for Piano by Jan-Peter Klöpfel)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f0cbf1b4d8353c7d38d634782ef32d11271ec9b2ef22fed47d344bed9babcd. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE862400449.
The Well-Tempered Clavier, Book I: Prelude and Fugue No. 1 in C Major, BWV 846: I. Prelude
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9484fa459d03b4c3a4031ab870c8488ba79e2e9480e702cb15a07151f1cd83f. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE862500236.