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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdbe204ec138401ced32960882526716b3ff4ab2ce4e6cfb419f4b8f67fd54fd. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ccdd8856-1c32-46e2-a961-75de52da0c2c.json and https://artists.proofprofile.net/proofs/artist/ccdd8856-1c32-46e2-a961-75de52da0c2c.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xada97e8d00b929281412350635363e558922054aba3e320ef8f01a58010878ce. 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/ITD541500313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea65ac8f566f64a87f0763601136785a402790e8ec75bc8a944f14a837cb2c19. 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/ITD541500315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11893a808e326a1ca06d02e4660e86ed7881f573bb9a6c7fa7e965d907752a5e. 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/ITD541500316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf22ad47d2c30a0ca2cb9169ede36f093f7eaadc0bb7ab5c5857972cf32d6746b. 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/ITD541500317.
Ballo Excelsior: Quadro II - La Fama (Danza) (Allegretto)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99df33694ac39ac523381e209b23531ab95cb3854c92c1ee52e458b50ea27552. 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/ITD542001999.
Ballo Excelsior: Quadro VI - Effetti della elettricità (piazza del telegrafo di Washington) - I fattorini del telegrafo (Galop)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x684b1bf53fc648f9e268772b0f11a8947a7ada6b99f589dba356a91535659c00. 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/ITD542002008.
La Belle Époque Italienne: Ballo Excelsior
La bohème, SC 67: Che gelida manina - Instrumental Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e8d1c2a662b673465f271f020315db79983164400f2632ec1197d6af515d761. 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/ITD541801126.
Roncole Festival 2015, Vol. 3 (Live Recording)
Roncole Festival 2015, Vol. 2 (Live Recording)
Roncole Festival 2015, Vol. 1 (Live Recording)
Arias for Soprano: Only Music (Instrumental Version)
Un ballo in Maschera: Saper vorreste - Instrumental Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x172655a41574eb3695f9ec73ee80514b0e45260f72c00c371556432e0ae9658d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ITD541500330.
La traviata: Addio del passato - Instrumental Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e663697181ef9c49fb7a4c6e48d5bb55aa826ff2c6d99941529bfc00cce6839. 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/ITD541500333.
Arias for Mezzosoprano. Only Music (Instrumental Version)
Il barbiere di Siviglia: "Una voce poco fa" - Instrumental Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90500ed2ecc4fbd921d645a8137625dd739c969651cfc229ebe81dda9d770184. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ITD541500355.
Le nozze di Figaro, K. 492: "Voi che sapete" - Instrumental Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b4f446e90dbad7ebbed546f2ce6583121b63b2b86a8cc684c1e91f98f7a9e02. 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/ITD541500356.
Il trovatore, Act II: "Il balen del suo sorriso" - Instrumental Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x838bb566a6080b69a3c1b2bda5615f014fbd02e3565edd78d2aa86cb7b76183d. 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/ITD541500360.
Le nozze di Figaro, K. 492, Act I: "Non più andrai" - Instrumental Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb569a85b14ffef0f6dc5551ec6221d895916bd38a558c76f157e743ae9f7b880. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ITD541500367.
Don Giovanni, K. 527, Act I: "Madamina il catalogo è questo" - Instrumental Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f7f5bf651d69a765cd05c0094400a567b9aeabd835ed0bb8a95ca5312978f03. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ITD541500368.
Arias for Dramatic Soprano. Only Music (Instrumental Version)
Tosca: "Vissi d'arte" - Instrumental Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bac36ef7f80d2444da28e6bb1350ae48d4c7bf2b054aa7b7ed9343056794cf0. 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/ITD541500343.
Durante: Requiem in G Minor & Lamentatione Jeremiae prophetae
Bossi: Organ Concerto in B-Flat Minor, Fantasia sinfonica, Sinfonica-overture in E Major & Siciliana e giga (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd82667253a2642e98d831a4248cf0d247f1969e577b4989e7f2365608f2304f. 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/ITDQ79120973.
Largo, per archi, armonium, arpa e pianforte
Orchestra della Filarrmonica Polacca di Opole
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25d9e80e43ac04fe060366a36c8a5c90042e08baa7d238548c5aa19baed4eff7. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITD541401377.
Collana musica sinfonica e strumentale: Sinfonie e arie da opere
Collana musica sinfonica e strumentale: Il violino e la viola
Classical Music Composed During the Great War
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ae1bf78ca98e025fc541cf77c8b882ab86c37ebe77e67d3ad4bda96867cfe28. 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/ITDQ79922151.
Requiem in E-Flat Major: Kyrie (Soloists, Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e995f199450584aa7ae21c02b3ec239c2775fbd9752c996ae1915fa67f903ac. 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/ITDQ79922152.
Requiem in E-Flat Major: Dona eis requiem (Soloists, Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61c1c32779b8d75cf44619b366e1ad01d43194478396adb2cfe810d40674b492. 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/ITDQ79932215.
Requiem in E-Flat Major: Libera me Domine (Chorus, Soloists)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9d117f1cc8c474e46d66d0a510a8da2e2af48fe592701c3b948f90b217b8aac. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ITDQ79952215.
Requiem in E-Flat Major: Dies illa (Contralto)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffe0b3466913aa2b56b89fd4429e3134411347ca0a1d314c0a6ba79435f40f7b. 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/ITDQ79902215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd124dd0c360d20293bdb1af2313058df9d385ea65b0725ebe87978f36ca55044. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ITD541400311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x683929b2e8cf49ae612128ac0fd3104ee0e93f80d344f8b4f4d5a0f272ac1566. 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/ITD541400312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95bac3bd0aec09fbbcaa4693fefaa5e564221fa3752c94b5377147d944ecb8f9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ITD541400283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x085012d2a479ab5ddd86ce503649e9c20fb2e925132660ab4df963d341af0ee8. 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/ITD541400435.
Sammartini: Concerti grossi, Op. 2 & Keyboard Concerti, Op. 9
Nutcracker Suite, Op. 71a: No. 1, Miniature Overture. Allegro giusto
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Nutcracker Suite, Op. 71a: No. 2b, Dance of the Sugar Plum Fairy. Andante ma non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe86a54994795979268b84ecbf1e440fec5d4f99d74457c379151456e26719e5b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITD541400484.
Nutcracker Suite, Op. 71a: No. 2e, Chinese Dance. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6512961155411ca9373cf0c0b0d4b590b8e1165c2f6742d05e8d756bb5289016. 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/ITD541400487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7803415ef9a3d5624bd5cdfb402d48a332caa6c96b0be33ff9b1f4cc365e9ec. 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/ITD541400422.
Bach: Concert for piano and Orchestra No. 1, BWV 1052 & Suite No. 2 in B Minor, BWV 1067
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bac36ef7f80d2444da28e6bb1350ae48d4c7bf2b054aa7b7ed9343056794cf0. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ITD541500343.
Flute and Harp Concerto in C Major, K. 299: II. Andantino
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Flute Concerto No. 1 in G Major, K. 313: II. Adagio - Allegro ma non troppo
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Flute Concerto No. 1 in G Major, K. 313: III. Rondò - Minuetto
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Piano Concerto No. 19 in F Major, K. 459: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe60d12c9426cebefe39ad0004500581ead769a91b651b24f429db48be3ba31bf. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITD541400339.