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 0x6e2c0de309752b55336a22bb78c708ee6cb092c8af228040ada5a30522019dc5. 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/e73de329-0db8-44fe-bc28-6ff6858694de.json and https://artists.proofprofile.net/proofs/artist/e73de329-0db8-44fe-bc28-6ff6858694de.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Classical Collection - Schumann - Leyendas Románticas
Red Edition - Brahms: Serenade No. 2 & Symphony No. 1
Mozart, Jupiter Symphony, Die Zauberflnöte,Eine Kleine Nachtmusik
Los Grandes de la Musica Clasica - Felix Mendelssohn Vol. 1
Symphony No. 4 in A Major, Op. 90: III. Con moto moderato
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 0x03431c2e14e8544f8f868e2cca4525536ac2a759253e581f8103e1848dd98223. 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/QM4TX1566640.
Symphony No. 4 in A Major, Op. 90: I. Allegro vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe29639de0178526d4c8f88a9e9279c9860cc5ce0ccd03f678140692492832570. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/QM4TX1566638.
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
Symphony No. 4 in A Major, Op. 90: II. Andante con moto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11de00dc6c06b0c40732b43d09da1e4e7d695c364d849815c40558f3eb24b1df. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QM4TX1566639.
Symphony No. 4 in A Major, Op. 90: IV. Saltarello. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2d7f0cf0efab442e8de8b6a713398f9b360f6b9ba9f128a47f5f24753dcafc0. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM4TX1566641.
Boléro: I. Tempo di Bolero. Moderato assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cf524923c69005c10ae09cc84babd68e43ab838689cd748161b8c62b1af2b53. 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/QM6P41416636.
Violin Concerto in E Major, RV 269: III. Danza pastorale
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd12d7516fc17cb198a86a1cb6d94dfe45712a67aca4b8afe31f3c2947dab7c33. 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/QM6P41416643.
Klavierkonzert Nr. 5 Es-Dur, Op. 73: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05fecb063d8bc4956744142cdd53215733f2c74bfc07bb86a7c016e34e79241d. 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/US2TL0924001.
Fidelio, Op. 72: Act I: Finale: O welche Lust, in freier Luft den Atem leicht zu heben!, "Prison Chorus"
Bulgarian National Svetoslav Obretenov Choir
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d158626c933daa10a1026b5ce36bdbd8e80a1c5eb480f600a6a914c4146adb4. 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/US2TL0924017.
Piano Sonata No. 14 in C-Sharp Minor, Op. 27, No. 2, "Moonlight": III. Presto agitato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe6f83aa7f38122b47920630a546ade39a4554c18c623c50c4f3ffd936910334. 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/US2TL0924026.
Symphony No. 3 in E-Flat Major, Op. 55, "Eroica": IV. Finale: Allegro molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x537627faca90609fcd159b23550fd25e34879f062bd1dd8837ab3ffc91c98af5. 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/US2TL0924014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaf87d25f581a52d61e9a63349ea20212cf6f78e9fcd431e82265cb66073b53d. 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/US2TL0924019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd24f8d70ca4ce1ff1fea18f86e62c6b83ddbed2d1e4e83b4138e845b7ba581d7. 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/US2TL0924015.
Bagatelle in A Minor, WoO 59, "Fur Elise"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dffa285e9649921e8587a034fde22ea2dd9980fc671ad001ccf16ec5a29f3d3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US2TL0924028.
Overture to Collin's Coriolan, Op. 62, "Coriolan Overture"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6aa31555fc0989c9647bf4900c02ff77c1722dc2633fd6fd31a207f0c233772. 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/US2TL0924021.
Piano Sonata No. 8 in C Minor, Op. 13, "Pathetique": II. Adagio cantabile
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd213cbbfe5c6af47828872d586038c290ac26913157721f7afecdaea08f91409. 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/US2TL0924036.
Symphony No. 3 in E-Flat Major, Op. 55, "Eroica": I. Allegro con brio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65e115cb601197626427be615f20508ac9240727928bb1fc4802dead1f0b1660. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/US2TL0924011.
Symphony No. 3 in E-Flat Major, Op. 55, "Eroica": II. Marcia funebre: Adagio assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60666dc3bfa62963efc3dcee60a1693715d378e6d192161c3d03f8435c6f140c. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/US2TL0924012.
Festive Overtures - Handel, G.F. / Gluck, C.W. / Mozart, W.A. / Beethoven, L. Van / Weber, C.M. Von / Tchaikovsky, P.I.
The Abduction from the Seraglio Overture, KV 384
映画の中のクラシック モーツァルトの映画館
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b5d871f54aecc71ff242dbe913400a1e85bfac343cf2ad98c592634205184a7. 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/USSJ10901507.
On the Beautiful Blue Danube (An der schönen blauen Donau) Waltz Op. 314
Top 200 Classics – the Very Best of Classical Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d3ced83fb69b4297520c1f6d277fd48729ba53713f45fc845ab9263fbca1f0. 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/US4R31015979.
Suite for Orchestra No. 3 in D Major BWV 1068: Air
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb995136da29764dadd5c8dfbf1b1e77be546781032dbc5d8c7aef2dc31b09c6. 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/US4R31015984.
Prelude To The Afternoon Of A Faun (Prelude A I'apres-Midi D'un Faune)
100 Most Relaxing Classical Music In The Universe
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88fc981fe4aef893d1f68b112533f1563d160262e65ceebd56ce89cbe3fcd06f. 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/USSJ10813895.
The Marriage of Figaro, ("Le Nozze di Figaro"), K.492: Overture
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eb4a6299ecda713f6a6d475f83f409a54298b9ef1f5c229ae6abc4b7f9ed422. 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/DEA580600059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x932653fb0241a58e593fd8856b64039d40f09eea01c55b69b803de0c4382e92e. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/USBC10401984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96a7dea7d06862b18f23b6dba83ce65e3d43198a1a538e0c9408640b7a4d012f. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/US4R30509152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa50cbe32a0a8b8b534884327e4b93f514719af7813782f20102c8c61ee8c19ab. Chain 2 (Bitcoin): anchored in block 960161 (2026-07-29T22:51:26Z), 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/US4R31015977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe524245d429ddd5a4a72816cb1a18fdd1a8e4654484f8a0d12882a8fc54df5bd. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/US4R31100845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64bae1a17f5d98994fdbf09041597b730fb0bbcff2e454c2e14efdfd811c58fa. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/US4R30509156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22c0e450ebc5363144d0675f5dd0d7dfbee1be623159614bd66d4cf57b24047a. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/US4R30511264.
Serenade No. 13 in G Major "Eine kleine Nachtmusik" KV 525, Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa419598bb46bc2683ff31248fa9f37be0f53638e59c402152b2afe9f251e5bbf. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/US4R30908473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44b98ab71180e3bd48dcab1ac581885b7cf319bd42062b5aa6554b76f628cfb5. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/USZGD1684618.
Hungarian Dance No. 5 in G Minor: Allegro, Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fd4c25967b99977153220b94fa8e452d5f0a0f3e4cc0dea6aa456aec05d68b2. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/SEWDL0780305.
On the Beautiful Blue Danube Waltz, Op. 314
The Greatest Classical Collection Ever: 222 All Time Favorite Classics
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c68195f1ea9d67b3bb563dd91b6691b46472866e581d26f6c4e1b2b4e74bc8. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/US4R31334337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x999df95fdc686a63d5acb04dd9cb73df14dc076a8c35436b6d094fc115b9ac23. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/US4R31334338.