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 0x1deb63c918e30c745d264f21b5671b237a8db7cefeaea73282a5ddafbc66b05a. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b2545d0a-c934-4043-bf8a-1150a94607a9.json and https://artists.proofprofile.net/proofs/artist/b2545d0a-c934-4043-bf8a-1150a94607a9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Sammartini: Trio I, III, IV, V & Sonata III
3 Ritornelli, M.S.113: I. Allegro in A Major
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 0xdc8c5e6d44fc99ec7d8efd795b3de40bf0b9d291ee3a9878e38e5a14aaea91c3. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/NLY331701473.
3 Ritornelli, M.S.113: II. Allegro in C Minor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b019dedf670b398abc88153a2dd6b76e97e5749eb4a8e78120d1309a93a4a46. Chain 2 (Bitcoin): anchored in block 960167 (2026-07-29T23:42:34Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331701474.
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
3 Ritornelli, M.S.113: III. Allegro assai in C Major
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x632e4739f3c692553e9733e4c48bb0f9a11e1533a18d7c0fba137ee0a2227833. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331701475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93d5e6dff8374106f8ded262c59b28d761de29aeefd85bb1361ee73bc27d28a2. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331701479.
Bossi: Opera completa per violoncello e pianoforte - Opera completa per violino e pianoforte, Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7218b0ef16778ff05b1bb5ce3c4586da743bb96382e97a2c26ba490b6400dc43. 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/ITD542301664.
Violin Sonata in G Major, K. 301/293a: I. Allegro con spirito
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e1b0cd60bc4f7e7eddff8bec656eb14b6d5df71db81f0f5cb5e390f20fea126. 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/ITD542301666.
Violin Sonata in G Major, K. 301/293a: II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x679a2e594c7b981b4c6e06839e920039fb9153cb32ebcf16fbb504a4744d80e3. 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/ITD542301667.
Così fan tutte, K. 588, Act I: "Un'aura amorosa"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7128d6c49af37c863ec655551ff4b0a06ee98d629108f3f8d8920cb4f6fef249. 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/ITD542301670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67738e09b8dde36622370cbb420f44c97a8113be2da9a7f73532b378cd4fab2b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITD542300964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x185243c3669401c4edec457061f91ba3015245cf047e5e1901d37ef6e774d0da. 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/ITD542300990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0282cc47c4e77f3b60909884641a3c427b742941a85fd0e8e040142aa3012ed8. 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/ITD542301009.
Bazzini:6 Morceaux lyriques, Op. 35 - 3 Morceaux caractéristiques, Op. 45 - 3 Morceaux, Op. 46
12 Concerti grossi con una pastorale, Op. 8: V. Concerto in G Major
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50bc31cb1962f78ab339f69ea862c905af5b3d79a1f408ca456c27e49bf2c558. 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/ITD552006205.
12 Concerti grossi con una pastorale, Op. 8: VII. Violin concerto in D Minor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ab322cb24d860480ba6726c06afca516110e31888e2345d4fd956a5cb4895ef. 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/ITD552006207.
12 Concerti grossi con una pastorale, Op. 8: IV. Concerto in B-Flat Major
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb639fc4207f193e8a1d4ef0f7725f2ca183a996b34267a7b0ef486effcd53528. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITD552006204.
12 Concerti grossi con una pastorale, Op. 8: I. Concerto in C Major
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb473895dbd9534380c35dcba228261c29ed611856526242c467d2cc51fe5d66e. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/ITD552006201.
12 Concerti grossi con una pastorale, Op. 8: II. Concerto in A Minor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b53a972ce80cc890bd6c70d8479fab24f7880bcdaff1e3b3c4607d17135ebad. 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/ITD552006202.
12 Concerti grossi con una pastorale, Op. 8: III. Concerto in E Major
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e33a279d2d5be9fa261afc3fed3abc6f3939b32d96fa5d6ad240b59ba5bb4c8. 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/ITD552006203.
Sonata for Violin & Guitar in A Major, Op. 3 No. 1, MS 27: I. Larghetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa25e646df236469c52bf3be5659afd54916cc388725db6b52c4440cf58dd0085. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITD551074302.
Sonata for Violin & Guitar in E Minor, Op. 3 No. 6, MS 27: I. Andante innocentemente
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x017a097a6a365aa81bb1e6b16e248a94df97f68d602e3135b66fe4244c0cb920. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/ITD551074312.
Cantabile in D Major, Op. 17, MS 109 (Version for Violin & Guitar)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb95b177d8c814b1cebd951ea8066cad9e7b1275eaf4d681a34d358cc3bdca650. 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/ITD551074317.
The Mystical Violin Between the 19th Century and the 20th
The Six Sonates for Violin and Harpsichord
Sarti: Complete Chamber Music & Keyboard Works
Giuseppe Antonio Ellena: Composizioni per harmonium e violino
Orchestral Suite No. 3 in D Major, BWV 1068: II. Air
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x816829859395a19aea8e7bbc1c82f9fe2c249aba0410543dc54193b38c582646. 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/TCAFF2036379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa546c67479280cce7975fd2cfa75395f6ed8360efcacacf022f5a29ac228b507. 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/TCAFF2036405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c971b2364cf4f030e133b7247ab564c5e66edca02913634b84e3f485945ef72. 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/TCAFF2036411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a7be3a9e5176c7a469c7a03ada63c8ba828fb446e6a6dfb7b644686e8fbc0ac. 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/TCAFF2036419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9b0fe2e53eda52684d0cbcb9d8a548718fb518bf24947f47ee6e9b266a96289. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAFF2036440.
The 19th Century Salon Music (World Premiere Recordings)
B. Marcello, J. C. F. Bach, Spinosa: Sul filo degli affetti, La Voce di Cassandra
Musica sacra ai tempi di Don Bosco: Prece di un angelo & Missa pro defunctis