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 0x642853eec85c030c81769420e83eb8520d8b6b32485d2bfca46a0428f288a3d8. Chain 2 (Bitcoin): anchored in block 953762 (2026-06-15T08:21:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b67910fb-819f-4f44-a813-b91db3b0b0a3.json and https://artists.proofprofile.net/proofs/artist/b67910fb-819f-4f44-a813-b91db3b0b0a3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Violin Sonata in E Major, Op. 5, No. 11: II. Allegro (Arr. For recorder and chamber ensemble)
Corelli / Veracini / Sammartini: Baroque Music for Recorder
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 0x8b355cc8548620a525346f116615efec2bfad1934ce5247798a24fe3f9f3aa12. 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/SEAEJ0245020.
Violin Sonata in E Major, Op. 5, No. 11: III. Adagio (Arr. For recorder and chamber ensemble)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x327628bec82904fccfe13d23bec7c6016fb4983155aea93a198dc30665346dc4. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/SEAEJ0245030.
Violin Sonata in E Major, Op. 5, No. 11: IV. Vivace (Arr. For recorder and chamber ensemble)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa78c2da399ef1bbf63cd8d41d30f39b0b8082f05e5120cb4a4db2e375c3c15d. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/SEAEJ0245040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfce570ca950921a1c228f5929016bcb36d421c177f25bd3437bba486b19dc4c2. 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/SEAEJ0245060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf9c4d06c228b345121220229d2810e91e5649ff1031d70887ea22f362cef87d. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAEJ0245070.
Sonata for 2 Recorders and Basso Continuo in D Minor: I. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36f613211a88331fe632eb876b8219c9f0e05a74e8fd6259d09373be2337d15d. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/SEAEJ0245100.
Sonata for 2 Recorders and Basso Continuo in D Minor: II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefbf408094d167e4b58d61187b2bad224b7021fe929f38f95047d1a5371cb48b. 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/SEAEJ0245110.
Sonata for 2 Recorders and Basso Continuo in D Minor: IV. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4df439e3beb94bc1fbf738e311f8deb0a972418dd249675e3741d8c91ac41c66. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/SEAEJ0245130.
Recorder Sonata in F Minor: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bd9696e9dcbe188137de8a93fc10a476502d9bcd7d4d7f37aa32dd26c77b00e. 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/SEAEJ0245160.
Recorder Sonata in D Minor, Op. 2, No. 2: I. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e1f3b3eec7c32cdbbe3f1f85b4e66707d0a879b5471b71dc1c1defa7134f5fa. 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/SEAEJ0245170.
Recorder Sonata in D Minor, Op. 2, No. 2: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22d079e49c5ce181be861f25261dcded1a94ac642f3b36ca377158da1e34100e. 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/SEAEJ0245190.
Violin Sonata in E Major, Op. 5, No. 11: I. Preludio. Adagio (Arr. For recorder and chamber ensemble)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ca2ec78bf00ca9efda6c017eb0395857802a54872e5402518047faa34da39e2. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/SEAEJ0245010.
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
Violin Sonata in E Major, Op. 5, No. 11: V. Gavotta. Allegro (Arr. For recorder and chamber ensemble)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabdfe86394160afa7624a132619f8761642c91fd1fc40eee680a1cc5f31114cf. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/SEAEJ0245050.
Recorder Sonata in A Minor: III. Tempo di Minuetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0a79c150e5b71fc9f3362a015d766fe742dcc6e062ae25f514f88b8ed32b74e. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/SEAEJ0245080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x580f5c545fcd691ef4d8b5f6cbd10f47a5443637db01f0cfc5ed70fd13eab864. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/SEAEJ0245090.
Sonata for 2 Recorders and Basso Continuo in D Minor: III. Affetuoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83e52a65c375849a7935c1dd22f0a82e196d7e8923bd057e0f65a2b868ccfd50. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/SEAEJ0245120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dce489902769f5b3081ad133a99de414f192a2ce032588660b428fa5933304a. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAEJ0245140.
Recorder Sonata in F Minor: II. Spiritoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e6bd61f62e48c68a531ef0b697f9ab08ad59ef0d66d3c5ff86ef7c89d1c8b11. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAEJ0245150.
Recorder Sonata in D Minor, Op. 2, No. 2: II. Giga. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f9af9391746768621bcabfae1533932c2a83ecf1f8eb86ef1aec8a96f6aa808. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/SEAEJ0245180.
Recorder Sonata No. 6 in A Minor: I. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaa087388fc10eeba205c4bc9e9c5f7e37a31a498a6f3d2fbc50b476a990572d. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/SEAEJ0245200.