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 0x30fa21f12ccd4d9d6ec3d164161714b5faf8595b91209b5b90e0e5a22997eccd. Chain 2 (Bitcoin): anchored in block 954603 (2026-06-20T21:47:54Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c2ff8b3a-3d78-4259-80cf-5b8e6f36b496.json and https://artists.proofprofile.net/proofs/artist/c2ff8b3a-3d78-4259-80cf-5b8e6f36b496.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Arias, Romances and Songs with Clarinet Obbligato
4 Romances, Op.2: II. Eastern Song (The Nightingale Enslaved by the Rose)
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 0xae3414d9341dd5375c94aef2b23f74235aab0981606ca1f90f0b910d6dde402c. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/LVL151800899.
2 Gesänge, Op.91: II. Geistliches Wiegenlied. Andante con moto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dce78f4cd600dacd81c8762416ad9585c25396c0c3129a01d9ec6aacbc85da3. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/LVL151800901.
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
Великие композиторы: Бах, Моцарт, Бетховен
Бах, Моцарт, Чайковский, Рахманинов: Шедевры классической музыки
Bach & Vivaldi: Great Baroque Period Masterpieces
Concerto for Lute and Strings in D Major, P.209, F XII, 15: II. Largo (Arr. for Guitar and Bayan)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd995b2230281eeceb62beb8e5d542fe28f27e811879790d258d6a78d7b787134. 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/RUC031400002.
Хорошо темперированный клавир: Том 1, BWV 846-869: 1. Прелюдия до мажор, BWV 846
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x464a5e1b6d9f066d79ceb3718ecdac811aaa6bf7be1f9191ec55ef8abb3b9ce7. 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/RUB361900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28e73900b9b9560c8b4a27f0372214e73891f8ff73d0956ff736f6a5eeb2b621. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/RUB361900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef35d9a6bc72bae64ba57429e9315f233ea46d80abfb65b5c27c59b5f2670e20. 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/RUB361900007.
Cantata No. 76 Die Himmel erzählen die Ehre Gottes, BWV 76, Pt. 2: XII. Aria – "Liebt, ihr Christen, in der Tat"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x289eedfd9a034bfef938cb4639fdfe21bffc6514f8c7bf5cf15694f9a2507ed6. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/LVL151800903.
Bach, Vivaldi, Albinoni, Rameau, Gluck, Gounod, Caldara: Calming Baroque Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc121a9d78e0467a498e720d3d4aca93e9360381072a96693b60ba7947afe8b3. 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/RUB011000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb99068b83ce41bf4e1e6d1db57791cb0a62ea0e4fca7d63d4a8017ec8db13502. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/GBCFU0400559.
Debussy, Satie, Ravel, Fauré: Impressionist Era Music
Bach, Beethoven, Bryukhno, Bryukhno, Chopin, Debussy, Glinka, Mozart, Satie, Spohr: Schlaflieder für Kinder