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 0x24fe80a12bf13aafd6765433b2b51d08edaf934bb6d6969836736d67a6712fa6. 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/923bc118-0da1-490c-92ef-c124a1b9a825.json and https://artists.proofprofile.net/proofs/artist/923bc118-0da1-490c-92ef-c124a1b9a825.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 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 0x2d2d325def1fa2cda363a71d24125d583edd9f4bc4c7dff8464d4047043a6a3e. 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/ES7890900907.
Giuseppe & Giovanni Sammartini: Organ Works
Handel, G.F.: Italian Cantatas, Vol. 2 - Hwv 79, 105, 142, 171, 173
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd70f9e749504f48bf022bc6206ebd0d92b71179fc563f0ab5f64abcaf2eabade. 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/ES7891101327.
Handel, G.F.: Italian Cantatas, Vol. 3 - Hwv 78, 140, 150, 165
Scarlatti: Serenata a Filli - Le muse Urania e Clio lodano le bellezze di Filli
Apollo e Dafne, HWV 122: Aria: Felicissima quest'alma (Most fortunate is this soul) (Dafne)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2284cd4fcfb24a8cefc3224df517b5174632dd87ed539c0cadb21f3c53b3a877. 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/ES7891001405.
Handel, G.F.: Cor Fedele (Clori, Tirsi E Fileno)
Harpsichord Concerto No. 6 in F Major, BWV 1057: I.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac24cb1a7dde6030222a0ff6daa269853cb27a0f236d88c4dfac5c86d778d088. 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/NLB151900244.
Harpsichord Concerto No. 6 in F Major, BWV 1057: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb15de329c3351867925294142815b840cb443e40f4b0523a6a7038a4411afaf. 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/NLB151900245.
Harpsichord Concerto No. 1 in D Minor, BWV 1052: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a841e895544b1a63b339752d1aecdaffd7788bda7f20dcfdbf822b03b4fdc13. 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/NLB151800267.
Harpsichord Concerto No. 1 in D Minor, BWV 1052: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf624d6a7544509d1996b1ac64cd7ca687817ca87794f1e6dd8e84f95f0f26de. 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/NLB151800268.
Harpsichord Concerto No. 1 in D Minor, BWV 1052: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9425b7b0b7f33beb46fb2e4a05c7c77b5f7013c34d994f534f999c14a5f31798. 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/NLB151800269.
Harpsichord Concerto No. 2 in E Major, BWV 1053: I. [no tempo marking]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cf58e0c0d6b637f861cb7a93fc4ca8ed578587eea3bae41795d9abe1d400d27. 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/NLB151800270.
Harpsichord Concerto No. 2 in E Major, BWV 1053: II. Siciliano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x605761a74ff1330f6d447083c54081839aa6a3ec44e0a3015a5465c3f46f7808. 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/NLB151800271.
Harpsichord Concerto No. 2 in E Major, BWV 1053: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f4d340c515cc61346edaaa3d963e3ef91f7f239b2dc51807a7eeb1910737767. 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/NLB151800272.
Harpsichord Concerto No. 4 in A Major, BWV 1055: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ac6e24df7651b0b48e01af723ef693299e2a3ad0018845f5354d92337961bb0. 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/NLB151800273.
Harpsichord Concerto No. 4 in A Major, BWV 1055: II. Larghetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1649b564baf1dcf271e32dc67d20a7fb6b9eef018e41c7658cf887157b82ad5. 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/NLB151800274.
Harpsichord Concerto No. 4 in A Major, BWV 1055: III. Allegro ma non tanto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x562f50deb9ce9d0158d4414cb004c20d761cf296eff8eb83969862c8652e10b4. 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/NLB151800275.
Harpsichord Concerto No. 5 in F Minor, BWV 1056: I. [no tempo marking]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e2e9b58843c0b807efca4ddf8b70ef1c02c7196aad7bf0da91ccc09f198b82. 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/NLB151800276.
Harpsichord Concerto No. 5 in F Minor, BWV 1056: II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf01a89c8dfff16c52132804755798acd52df951bb0d92c65a56d5b7544d9f295. 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/NLB151800277.
Harpsichord Concerto No. 5 in F Minor, BWV 1056: III. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x496b5b55c519ce14a5016bb335d7eff715695dfd2d157fe06a3e86b9af13e368. 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/NLB151800278.
Handel, G.F.: Italian Cantatas, Vol. 4 - Hwv 83 and 92
Juditha triumphans, RV 644: Armatae face et anguibus
Geminiani: Concerti Grossi tratti dalle Op. 3, 1 e 5 di Arcangelo Corelli
Handel, G.F.: Italian Cantatas, Vol. 1 - Hwv 99, 113, 134, 170