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 0x41a07e152a661b918e684c225010c09547eb3b72fb5ba94d808c35436fab522d. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/556e610b-672a-415f-99d7-a2b579e015a4.json and https://artists.proofprofile.net/proofs/artist/556e610b-672a-415f-99d7-a2b579e015a4.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Bononcini: La nemica d'amore fatta amante
Stabat mater pour deux sopranos, alto, cordes et continuo: I. Stabat mater
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 0xbf7a85ff9962f26e8355c6ca8bc404711c25b0c25d67473676cccd1e1022ccab. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BEE640313901 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbdee9618b278637735c60f335b9d8f388d61d42489948b725077810e00ab218. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB200947608 — a six-check JSON result.
Handel: Il trionfo del Tempo e del Disinganno
Para la llegada del virrey don Diego Fernández de Córdoba: I. Elegit eum Dominus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x642c6266d553e82c4637ea687509997c49e960a225fe1cec78d03db8e2d4b76a. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USB8U1702020 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5a1a7b3c34fb56c0acc1db38dee2cf4a3cd7771f1af62dd129e6d1ed2ff7674. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USB8U1702039 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99e37914dd69f803a50f1fda3a92146151222c770140754b4dd73f39bdd366d1. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USB8U1702043 — a six-check JSON result.
Orlando Finto Pazzo, Opera in 3 acts, RV 727, Sinfonia: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9ac1c82e5a9207577fe7ac978754366bf5271f9881d51cb542c35c57bcf472e. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX290301480 — a six-check JSON result.
Orlando Finto Pazzo, Opera in 3 acts, RV 727, Sinfonia: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40eec8ff64476ab020891db34f46834fd754257e61a1ecff048bf8275b096d7e. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX290301490 — a six-check JSON result.
Orlando Finto Pazzo, Opera in 3 acts, RV 727, Sinfonia: III. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaed75b0bf30353821d4b930072503759013106ec1877da271f49196ac94571a8. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX290301500 — a six-check JSON result.
Orlando finto pazzo, RV 727, Act I, Scene 3: Prima dell'erebo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa79cbfe2e2d834fa528d5e6f99189f1012b661bc49f65cc63982c6628c631455. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX290301540 — a six-check JSON result.
Orlando finto pazzo, RV 727, Act I, Scene 3: Rassenera i vaghi rai (Ersilla)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aeb432efa4b54c3293f43d27ae6c7169bf7a069d8de9d84af5571d0aa03bd1f. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX290301570 — a six-check JSON result.
Orlando finto pazzo, RV 727, Act I, Scene 4: Son due venti infesti (Tigrinda)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1633a83ce4a426dc5c66c0c133ddc518f4728cf7446c5469536be556141859f. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX290301590 — a six-check JSON result.
Orlando finto pazzo, RV 727, Act I, Scene 6: Alla rosa rugiadosa (Grifone)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47031c9c9402c8f40ca0e34a01daf53d97cf9f79dd2506c4e00ee23fbddfcd22. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX290301630 — a six-check JSON result.
Torri, P.: Baviera (La) / La Publica Felicita / Egloga Pastorale
Armida al campo d'Egitto, RV 699, Sinfonia: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05dbaced878f8f40bca218be466a05ae304f17375be13ce8da2f03606500c824. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ130924010 — a six-check JSON result.
Armida al campo d'Egitto, RV 699, Act I, Scene 8: Nasce da tuoi diletti
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x806ff5cb4fd963a2374540b163ca9084bda669b477bf5646eb2bcc1ac04d41b0. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ130924027 — a six-check JSON result.
Alessandro Scarlatti: Davidis pugna et victoria
Gaude Mater 8 - International Festival O Sacred Music. Music of Various Religions Vol. 2
Jean-Louis Tulou et ses élèves: La flûte romantique à Paris
Scarlatti: Serenata a Filli - Le muse Urania e Clio lodano le bellezze di Filli