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 0x8fa7b43570cd42548a36646209506b80fabc27c2b6a521318d1832f1696fb5c7. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a2cf3f94-4aa1-422f-a4ce-f1501e946ce9.json and https://artists.proofprofile.net/proofs/artist/a2cf3f94-4aa1-422f-a4ce-f1501e946ce9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Overture (Suite) in A Minor for Recorder and Strings, TWV 55:a2: I. Ouverture
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 0x58fda5e097a0fd02acefc8afa6bb898b5c0b4068831e02c9a44546fd8d96eb00. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-21T16:23:09Z), 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/HKI199319105.
Overture (Suite) in A Minor for Recorder and Strings, TWV 55:a2: II. Les plaisirs
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d9364dcb154180336c5a5fc651d14b0f0321c9e05a6c22d5e1dcaa00bf04b94. 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/HKI199319106.
Overture (Suite) in A Minor for Recorder and Strings, TWV 55:a2: III. Air a l'Italienne
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x351996d8e613d4eab61aa2308e518d9392a3901d93e4c9fae1a147eea4009823. 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/HKI199319107.
Overture (Suite) in A Minor for Recorder and Strings, TWV 55:a2: IV. Menuet II
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b00facaa85da4368cef940dc0b50fa7b3fa07aba97c7afaeb0db249d50cdc2. 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/HKI199319110.
Viola Concerto in G Major, TWV 51:G9: I. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77bb230d573fb768dfc2117b84fd568b65551978922e6282f9fadb949269fd1c. 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/HKI199319101.
Viola Concerto in G Major, TWV 51:G9: II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf69f280fb2ba32749e59ab3ee0c53a8f76031d375997a7eb152988a24f588139. 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/HKI199319102.
Overture (Suite) in C Major, TWV 55:C6: Harlequinade
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8789a9d4da38439ae37be7300799f82485f69e380acb7023b40055ab1d8062e0. 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/HKI199919809.
Overture (Suite) in C Major, TWV 55:C6: Rondeau
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0accc6affccb8c1859bf7d46ea922f10d9dc91d7435e59edcf7236d580d6be2. 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/HKI199919813.
Sonates sans basse: Sonata No. 5 in B Minor, TWV 40:105: Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x620df57e1bad8c6f76bedf99af4f6568fd26d137e6319157586eea8fe8442706. 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/HKI199713602.
Sonates sans basse: Sonata No. 5 in B Minor, TWV 40:105: Harlequinade
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10733dedbc17114683da731f75281b1d966a88f4ed94b9b7001f76e98bbbd0a3. 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/HKI199919818.
Ouverture in D Major, "Darmstadt": Harlequinade
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd459a1109497097298ad8a7d97959cf5ef82858d221c9fca7c60bd10eb85993. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/HKI199319601.
Trumpet Concerto in D Major, TWV 51:D7: II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x314902b54da6fa138cca9a96b291d26c16cc4db0f675c536dc520d1478c68813. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199319602.
Trumpet Concerto in D Major, TWV 51:D7: IV. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9180d82d5b8b662b6d1f60921d88de9d2fdb41d2fa243c039a172bb830c8366. 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/HKI199319604.
Overture (Suite) in G Minor, TWV 55:g2, "La changeante": II. La Plaisanterie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2ab2c610c9bc3626d0024728e07ded069ed5db03689f7391253ecb77cc8087e. 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/HKI199603005.
Overture (Suite) in G Minor, TWV 55:g2, "La changeante": III. Hornpipe
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11d24a3f304f815e051536a0c08db2457856935bb43cc6daf1000d4b2fe9ddb2. 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/HKI199603006.
Overture (Suite) in G Minor, TWV 55:g2, "La changeante": IV. Avec douceur
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62ab9cbe6f62f692ea13d183ee7e0fb46ff38aeb60539d2c5b4f407d8499d4eb. 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/HKI199603007.
Overture (Suite) in G Minor, TWV 55:g2, "La changeante": V. Canarie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b09cf555fb2895831cdded044b453ca13c5dcb440a4e7448d8f2930eceec553. 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/HKI199603008.
Sonates sans basse: Sonata No. 5 in B Minor, TWV 40:105: Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9191fde7f4f3e3a3710065555cdfa35ab33caab86996acb4e6b1b84a91e1ef35. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199713601.
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
Mozart: Oboe Quartet in F Major / Flute Quartets No. 2 and 3 / Piano Trio No. 1
Concerto No.1 in D Major RV 269 :SPRING: - Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e4be60cf985165e1ba05ed7f1d77ae399daabd58fa004a6a61d9908380fd3e5. 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/USANA0431801.
Dances and Suites of Rameau and Couperin
The Shock of the Old - Common Sense Composers' Collective
Telemann: 6 Sonatas for Two Flutes Without Bass
Clarinet Sonata, FP 184: I. Allegro tristemente: Allegretto - tres calme - tempo allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a0b81f335fb1e04f8d862142101b2799b1e3f89e95a510578be2ed7035ee016. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USB8U1611904.
Telemann: Fourth Book Of Quartets (1752)