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 0xe08b94755bd835ade48dad981078f18f7491d3970dc7bb7c4463e0f94ae1f3f5. 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/58013e2a-ab2f-4905-a92c-2afb5a1c97f0.json and https://artists.proofprofile.net/proofs/artist/58013e2a-ab2f-4905-a92c-2afb5a1c97f0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Strauss, R. / Koechlin / Britten / Zimmermann: Oboe Masterpieces
The 50 Most Essential Pieces of Classical Music
Uplifting Classical - Music to energize your mood
Piano Sonata No. 14 in C-Sharp Minor, Op. 27, No. 2 "Moonlight": I. Adagio Sostenuto - Excerpt
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 0x26a66963575cb97a59163fec8d8ae3f0075b7c4e6efd5583a19e04d008b914c7. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USSJ10811078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x916033d2470ac1c2796b37d3725bda5e8ff8f334322170372097e29161e65158. 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/USSJ10811079.
Concerto for Piano and Orchestra No. 5 in E Flat Major, 'Emperor', Op. 73: II. Adagio un poco Mosso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc89af3987c2a6876fa21b3f41d776b3214d536a6baaf12c1b66bbd1bf1cce786. 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/USSJ10811104.
Classical Music from Ingmar Bergman Films
The 35 Most Evil Pieces of Classical Music
Oboe Concertos – Schuncke, H. / Nielsen, C. / Kalliwoda, J.W. / Ropartz, J. G.
Divertimento No. 17 in D Major, K. 334: III. Menuetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x007f1b0dd2c05ba644c67d308618a9584cc4e13113d351f92f9bb4d2d0404387. 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/DEA581600329.
Lo Mejor de la Música Barroca: Los Grandes Clásicos
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe679eff853d3e90fe3aafd3e5fde1a528585ade94ab41b6a4cf469c3d5607627. 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/QM6P41572449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3310f5e954f8b180ee1cfa0e07b19e5ee2b1ed1162bb20a8a123e4435a3a0b61. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QM6P41572462.
Los Grandes de la Musica Clasica - Jean Sibelius Vol. 3
Los Grandes de la Musica Clasica - Jean Sibelius Vol. 2
Deux arabesques, L. 66: No. 2, Allegretto scherzando in G Major
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ea9d5e06d234fa114abb3b9f015442f82dbe5c06d4743f23ff96caee05d87c1. 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/SEWDL0710316.
Préludes, Book I, L. 117: IV. Les sons et les parfums tournent dans l'air du soir
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89031096c4aa2c516ff3aef03b20cf6cac6c7067bef7a28486040eb5757824b2. 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/SEWDL6143071.
The Worlds Greatest Classical Chillout - The Only Classical Chillout Album You'll Ever Need (Digital Chilled Version)
Sonata for Two Pianos in D Major, K448: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbe4ce18d2a7347dd89a1c382a7acce0a48568e78ae3c013084451ece41174ab. 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/GBKTX0901660.
The 99 Most Essential Classical Pieces in Movies
Rinaldo, HWV 7: "Lascia ch'io pianga" (from Antichrist)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b03fa0440f71a1ffa154fa57ca42ab9df4c1834bff7c9892d37ee5e79709c8e. 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/SEAEJ9749020.
Cantata, BWV 147, "Herz und Mund und Tat und Leben", Part 2: X. Chorale: "Jesu bleibet meine Freude" (Jesu, Joy of Man's Desiring)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d6f9b3d319f00fd4a3dd2a456b5e472d00d5c5bf57e36f1092060772b4f501. 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/SEAEK9931100.
Grey, Darker & Freed: Intimate Music Inspired By the Film With Mr. Grey...
Love Me Like You Do (From "Fifty Shades of Grey")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32eae136ce214a343fc3da0721b680e63dcebff6e7ebbf52c8cc8beff0783362. 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/QMVRR1435093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fe7d0396a9418cd33fc206bab755e13c0f8ba3d14bff7ee009a957097d23624. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QMVRR1437797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a7ad4395e0ab8297b0d79d6474acd8b0774373b1cf2ae081156a0f3dc21b05c. 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/QMVRR1437807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f575e7a5b2798e7268d04da83c3267617534df284cc46a52967aa1412bf30e0. 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/DEA580800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29885f4a23d2e3e374713f8958a4e9844592385a7400b833d9d73c32c9b9c9e4. 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/DEA580600671.
Classical Masterworks - 100 World's Greatest Classics - The Finest Classical Music In The World
The 50 Most Essential Beethoven Masterpieces
The Beautiful Blue Danube, Waltz, Op. 314
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x523ace05c5b2093d2435bdfba6420cf10dbacf7a9f454727a58ed217c3bb2af1. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CAM460770127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89031096c4aa2c516ff3aef03b20cf6cac6c7067bef7a28486040eb5757824b2. 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/SEWDL6143071.