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 0xfd1f8b6e183834fbb709758228dc7199c93ac82e5e684b18c6a6de2211b2c041. Chain 2 (Bitcoin): anchored in block 953947 (2026-06-16T13:14:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/236045d4-532e-42ad-ba35-dbe846c6a6f8.json and https://artists.proofprofile.net/proofs/artist/236045d4-532e-42ad-ba35-dbe846c6a6f8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Antonio Vivaldi: Il Proteo o sia il mondo al rovescio - l'opera per violoncello Vol.3
Cello Concerto in C Major, RV 398: I. Allegro
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 0x597ee4a50d3d327bd0d008dbe783a4e3e9867e8f1aca8ef1b397a580cf9809bd. 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/ITJ092300214.
Cello Concerto in G Minor, RV 416: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cc1e7afe6d090cb1c190af221d59a66a8e96841c90a305758315174d1c566f6. 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/ITJ092300217.
Cello Concerto in A Minor, RV 418: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c88a729d7e39222e82f684503e1e391fda67e08cd7238996f5469d936942308. 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/ITJ092200581.
Cello Concerto in A Minor, RV 418: II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d77eecd6d3251fafa1bb7711e938579e738f6ec3fd3ac926de8155dda43ec19. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/ITJ092200582.
Cello Concerto in A Minor, RV 418: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x233ca31f186494996fb92920880a0b4e4f6761bad83d21b92af1ce8a11156b8b. 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/ITJ092200583.
Cello Concerto in C Minor, RV 401: I. Allegro non molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e81cd7c9378ef38b4bb70e078fff43779daeb190f526d4b31a611b3b3daf7c8. 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/ITJ092200584.
Cello Concerto in C Minor, RV 401: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x317835523986b2fadf3fccf9248652e736b9c266e9c31cf5d59f7d1af7d0bbd4. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/ITJ092200585.
Cello Concerto in C Minor, RV 401: III. Allegro ma non molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7041f58f53467d0ae36adb7236d534aff0a72e7ed0111019f6b6704f5f7dac9. 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/ITJ092200586.
Cello Concerto in G Minor, RV 417: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4941788f9e22fddd5b1dc08cef511e2c0be195c2296c82800b5b447ecfece584. 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/ITJ092200587.
Cello Concerto in G Minor, RV 417: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb61128e71ea6ae6d09f4277f17ca0ab5d5721618c604e944b1d088e489114fb. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/ITJ092200588.
Cello Concerto in G Minor, RV 417: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ace7fe3eb1b87e2f0cf66e335e64a7d8d1b40132d50c21f2e524d5d078825e6. 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/ITJ092200589.
Cello Concerto in C Major, RV 400: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94d84be73039246facc89ba4d26771fedef03592b78a3a8a5924b8cbec9efd12. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/ITJ092200590.
Cello Concerto in C Major, RV 400: II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x213773d7dc99891b7ec4d4c37f87f0e2992ee178690b782abcb1dd5b57405402. 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/ITJ092200591.
Cello Concerto in A Minor, RV 420: I. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d3b30b740fdb56aff0b29598df938b45f847dc15f4ee082536e77a42557b085. 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/ITJ092200593.
Cello Concerto in A Minor, RV 420: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x109c5151669ff636020d227ac22f4b2597ebae08633b3f331994f0504f884c6d. 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/ITJ092200595.
René de Boisdeffre: Works for Cello and Piano (World Premiere Recording)
Vivaldi: Concerti Doppi - L'Opera per cello, Vol. 2
Szymanowski, Chopin & Others: Works for Cello & Piano (Live at Oratorio San Filippo Neri, Bologna, 9/25/2014)
The Carnival of the Animals: XIII. The Swan
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaca65c985c2402772768143126444ddd712fc74ee840eb79d58707ca14ce6f7. 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/NLY331406494.
Mendelssohn: Complete Works for Cello and Piano