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 0x379d0918c7ed4b7329d4a97acdcb769067991b31e468de05f0fff1a399c14a2e. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9a927889-c75c-4b7e-b37b-b13d70d1561b.json and https://artists.proofprofile.net/proofs/artist/9a927889-c75c-4b7e-b37b-b13d70d1561b.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
La forza dell’amore e dell’odio: "Vado a morir"
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 0xbb20a571f04922666d5e8ec3b0096b152e41fc62d01c6f1819409778b823bf80. 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/GBF071400820 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5098cdb9253c6a024847fdb42ab6544621a6ee6fded97b72112ecb45cfceca81. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/GBF071400830 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e964dbee74d0872ebdaaae5362601b0067d651398ee5f59b9b664bd0ef86985. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBF071400840 — a six-check JSON result.
Siroe, re di Persia: "O placido il mare"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94aeaf4b600b6c271d5854e6af798f7e5172441193914695c733820dd5200761. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/GBF071400850 — a six-check JSON result.
Prologue To "La Clemenza di Tito": “De miei Figli”
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c0d253e5c8a4f1d23906f2a8185aba884d87ba93a145600cf8030f78474b65f. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF071400860 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfb79fae9609861065471180f372d49ecac8a7ea236aeed621a3b1080fca7e5d. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/GBF071400870 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7900e6894479a346c891fb46af88e0cc78844621baa750b16a83c891b152f1e8. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/GBF071400880 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa6953f8206542eae7b9fe93e4b9aa822950c6a8ea84d1dc8969f5a8bc6cb72f. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF071400890 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09818efde38dd011b4f86eaae7f2508a5f26241293e3c64b220af52d08e7574a. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/GBF071400900 — a six-check JSON result.
La vergine del sole: "Agitata in tante pene"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfde728c57c0363e559ab3f3872b5d1a132d19e294bbbb5f26de5995256eb28b9. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/GBF071400910 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4b94b09f3c1ff95bec4d7c147c40b1393532fdc891883e866e92f3b2209d3d0. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/GBF071400920 — a six-check JSON result.
Nuits blanches: Airs d’opéra à la cour de Russie au XVIIIe siècle
Concerto for Violin in C Major: 1. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe325fe265f298cdcbb946ccfffc39250e466f269730f0da76a2caee3f387652. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/DEN960900951 — a six-check JSON result.
Concerto for Violin in C Major: 2. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf6fd9c719181bff30e5369a53a6c497cefdb174046f5d28508596c512abefaf. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/DEN960900952 — a six-check JSON result.
Concerto for Violin in C Major: 3. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaef6f78ca4894140f4cf4236eb62451a7d164e3e26af436a50171296331627f0. 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/DEN960900953 — a six-check JSON result.
Concerto for Violin in G Minor: 1. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e870c39588b932d60f0fd072a1d02e9a048b12cd06d191a2554bce828d47477. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/DEN960900961 — a six-check JSON result.
Concerto for Violin in G Minor: 2. Grave
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x343f642d13255a108eadf1bc60826cad036e5c22cd086f21708514ec886a2024. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/DEN960900962 — a six-check JSON result.
Concerto for Violin in G Minor: 3. Allegro assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79fccf03cdc62b3ea87c18d734b8542214751cf2d632cd1950c6c15a0a738399. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/DEN960900963 — a six-check JSON result.
Concerto for Violin in G Major: 1. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f3f413a3d962f2d09b520280770fbceacf595361d78abce32f357a4ac50ceaa. 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/DEN960900971 — a six-check JSON result.
Concerto for Violin in G Major: 2. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa8434c58dabbffb98a97de018d5713e298b5d54dc2389f52c6de59dc5fbbed1. 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/DEN960900972 — a six-check JSON result.
Concerto for Violin in C Major Op. 2a, No. 2: 1. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbb1ec12a8a8aab46dda850fb799cee92929859544f6c38775f34ade068d4a77. 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/DEN960900981 — a six-check JSON result.
Concerto for Violin in C Major Op. 2a, No. 2: 2. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ba23b0a4f4de08c1b176712e017aa7e29b395f4d99fe1f579bd90d54552d07. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/DEN960900982 — a six-check JSON result.
Chamber Music of the Russian Imperial Court 18th Century
A Chamber Music Concert from the Russian Court