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 0x0be7a784028348ef0614fdb92ccddfc3bc658e5bd722e55bcdecd5f9af7a8bd5. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ce23dd5c-7007-4a50-a6c0-ad1854eb4bf3.json and https://artists.proofprofile.net/proofs/artist/ce23dd5c-7007-4a50-a6c0-ad1854eb4bf3.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Vivaldi - Tartini - Richter - Pergolesi - Telemann: Flute Concertos
Flute Concerto in F Major, RV 433 "La Tempesta di Mare": 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 0x03182e3b3a9e835816e3c7c77897be2f3b8d7124701db9dd895efd782cecc42e. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/QM4TX1793453 — a six-check JSON result.
Concerto for Flute and Strings in G Major: I. Allegro non molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6af2eb7d0e7ff677ce528aa021f58b0016e5ce3cbf71a5fc97e3a026032809ad. 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/QM4TX1793477 — a six-check JSON result.
Flute Concerto in F Major, RV 433 "La Tempesta di Mare": II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7db82ebd2d6aab8552c4bccbaf236e9fe850239c4a1eaf7b57cac9b2ed6b88e7. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM4TX1793454 — a six-check JSON result.
Concerto for Flute and Strings in G Major: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb0fc32a03828fc75d94512dfd874f49f7b665d4b8df56ff01e6ec9430ab59bb. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/QM4TX1793478 — a six-check JSON result.
Flute Concerto in F Major, RV 433 "La Tempesta di Mare": III. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e9ddacdb6d0a29de09cf6504b2580c8aa149aab2a56fcfd5716d525ea7b7fc7. 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/QM4TX1793455 — a six-check JSON result.
Concerto for Flute and Strings in G Major: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x228df392d49fd492d54c1a12b1a3a0e4b32c1e87826532345491a6bd95ecfe4f. 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/QM4TX1793479 — a six-check JSON result.
Flute Concerto in G Minor, RV 439 "La Notte": I. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a8defbf433eb98def5fc11db9e3aec319c7275ca5202a4f5867d5e56dce4a9f. 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/QM4TX1793456 — a six-check JSON result.
Concerto for Flute, Strings and Continuo in D Major: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70686bd0449d7d7e768442cbcab092a153493a7872e58821cf7c8ee0ccc194a0. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/QM4TX1793480 — a six-check JSON result.
Flute Concerto in G Minor, RV 439 "La Notte": II. Presto (Fantasmi)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x820b48c38a3c70c023bc07d5e8678957085585890ad604cc2aa29337d2d0ed90. 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/QM4TX1793457 — a six-check JSON result.
Flute Concerto in G Minor, RV 439 "La Notte": III. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0716fce33668a6bdcaa1e2476a657080db68c0a13eacc59be2ca13c545130ce7. 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/QM4TX1793458 — a six-check JSON result.
Flute Concerto in G Minor, RV 439 "La Notte": IV. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2227093948025bcfe0b9bdf98cc196fc02c76c5cd625fe5767d8a927f2c9480b. 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/QM4TX1793459 — a six-check JSON result.
Flute Concerto in G Minor, RV 439 "La Notte": V. Largo (Il sonno)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63310106806e45522f0c12b97b89ceda61bd1d2b50ba1a1e106e9d72574fab9d. 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/QM4TX1793460 — a six-check JSON result.
Flute Concerto in G Minor, RV 439 "La Notte": VI. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80b3f7abb87ca99a730b2a45dc5e84557a06d78720c595238fbb2a52576471d1. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM4TX1793461 — a six-check JSON result.
Flute Concerto in D Major, RV 428 "Il Gardellino": I. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbd11ed996bdb59e03a2a2b85198bdc0671cb68b2eeebf8964e732614acd028a. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/QM4TX1793462 — a six-check JSON result.
Flute Concerto in D Major, RV 428 "Il Gardellino": II. Cantabile
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce7daa2f5b96f27fe73708d1d37dbb4c64cac4e80fe29a7be575b747e5a8927. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM4TX1793463 — a six-check JSON result.
Flute Concerto in D Major, RV 428 "Il Gardellino": III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcff8c90e368c3c2ec9bafbf08a8656de6f10ed73aed2b72f877a3c24e05b413. 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/QM4TX1793464 — a six-check JSON result.
Flute Concerto in G Major, RV 435: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeabaaf30e44ccfd0cc65de8042f1f9a6e8d3c1433ecb8db45409b149acf1f2b. Chain 2 (Bitcoin): anchored in block 960387 (2026-07-31T10:06:30Z), 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/QM4TX1793465 — a six-check JSON result.
Flute Concerto in G Major, RV 435: II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d1410c5e3c19b472bccc7681ee0a6b23c45fa74899aabf8659034287ba789a1. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QM4TX1793466 — a six-check JSON result.
Flute Concerto in G Major, RV 435: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0b369a985332f77e93b5ab54b01fc8979bac5eba57a17c1157b3977c8e140c4. 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/QM4TX1793467 — a six-check JSON result.
Flute Concerto in F Major, RV 434 "Con Sordino": I. Allegro, ma non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x235960ab9f3a5b6ec25a198f6000a0da83ac45fc91cc015f8a22f316a3bb5c96. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM4TX1793468 — a six-check JSON result.
Flute Concerto in F Major, RV 434 "Con Sordino": II. Largo e cantabile
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fa42714c48cfb3d024d78f1dc25595a4b359663beb00ddc764074b88d778604. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QM4TX1793469 — a six-check JSON result.
Flute Concerto in F Major, RV 434 "Con Sordino": III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84ca498c445493f19bef5be4b61ccff415af814fc94679b334844844a04b7034. 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/QM4TX1793470 — a six-check JSON result.
Flute Concerto in G Major, RV 437: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfafe8338884b5ea9724470014125594dc171b296d6c6776d659229f84cc6b175. 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/QM4TX1793471 — a six-check JSON result.
Flute Concerto in G Major, RV 437: II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a944072368c6a11012d82af57dfa4c0d9de57adc51e72dacde7a5337d1180fa. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/QM4TX1793472 — a six-check JSON result.
Flute Concerto in G Major, RV 437: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa981adb2edbbfc85da13c21527ebdf8061311c068eed2323a6fe0f1e5e6d435c. 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/QM4TX1793473 — a six-check JSON result.
Concerto for Flute, Strings and Continuo in C Minor, RV 441: I. Allegro non molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48d04a2a13131139dfa4fc0ed57c28748c3d72adac4f2cddb3d6b7ec68acb67b. 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/QM4TX1793474 — a six-check JSON result.
Concerto for Flute, Strings and Continuo in C Minor, RV 441: II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfff48e1e5be37d2a5b13d408d26259c4957b539e7859ebea3ae16ed4783a35d4. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/QM4TX1793475 — a six-check JSON result.
Concerto for Flute, Strings and Continuo in C Minor, RV 441: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x754bcf369f1212a89552e395cf7b3403eb782fc1148b0d4d6641f52fc92df43a. 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/QM4TX1793476 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x982eb7bb08581f8b8c45a35963961cb23a59f84123d675de7d8a219ceeac15ea. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/USA561211320 — a six-check JSON result.
Haydn, Mozart, Beethoven: Dances and Minuets
Grieg: Holberg Suite - Lyric Suite - 2 Melodies - 2 Nordic Melodies - Lyric Piece No. 4
Mozart: Six German Dances for Orchestra in B-Flat Major, K. 606 (Digitally Remastered)
100 Most Relaxing Classical Music In The Universe
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb92df1bba7f68e9a93aacaa6f3bf2a168030f80cdcd6f6fdc651773a9485da36. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSJ10813872 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe20fbd91f2c9309b6b063c694e4606f7d7884af98d2d45b7dc95edd6b742a2ff. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USSJ10813874 — a six-check JSON result.
Twelve Contredanses for Orchestra, WoO 14: No. 12, Contredanse - Trio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf46b7c530230640ce9796c3a4edd1ba99234bcd7cd9b9c749f94fef6a5131085. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWDL9440291 — a six-check JSON result.
String Quintet No. 5 in E Major, Op. 11: III. Minuet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3ca8861a3d04673a54afd272ce7381f515972f2d7a98d69e5b0b16a34f47deb. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWDL9430582 — a six-check JSON result.