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 0xce8ced7babbcc59f0165f29ae1f2d05c6fd41e6381360bddcb739dd5f5c886f0. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/50516570-6927-49ad-bee1-d3b97223e710.json and https://artists.proofprofile.net/proofs/artist/50516570-6927-49ad-bee1-d3b97223e710.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Stradella : La bellissima speranza (Cantate, duetti e sinfonia)
Joseph and his Brethren, HWV 59, Act II Scene 2: Prophetic raptures swell my breast (Asenath)
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 0x8e364b3d829b5d348be8dad437e83cb60060d445bf8f3e7f84c85f1b7c8c5074. 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/FROV61923301.
Ode to St. Cecilia's day, HWV 76: What passion cannot raise and quell!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f0cb4f4c33e174d73674fec22ed33181246e8937f9ac6d0eb1ea77c8dfc1001. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FROV61923302.
Semele, HWV 58, Act III Scene 3: Myself I shall adore (Semele)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x179c308e5e141cde226c531adb615dc7b3f88f26154a34e2ab1da138cdcfc64b. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/FROV61923305.
Serse, HWV 40, Act I Scene 7: Nè men con l'ombre d'infedeltà (Romilda)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb98f7f81a9f3e8c37b96476121f7c957eba221da378d1d5681b601247f151e0. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FROV61923312.
David e Bersabea: Fu del braccio onnipotente
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b6ac1d6df07e55d912e0c15099e8d5811a71052c6193fc91ed77c5f28630c93. 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/FR46Y1846104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9338935dfcd805c38f3b0a4cafee8168dc132cc0502aa810f570ac1d0442499. 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/FR46Y1846108.
Folia (Bande originale de Folia de Mourad Merzouki)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a5c94f77969f7153575df842a27d51cbcc2ad362b462ff73cec4c92e845c04. 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/FR9W11820066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93dd694a0e2cba90fe46279a2a75491496a96e17f1ed056cfd395705c2e68424. 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/FR9W11820067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcab258f4aa98395cc9501005d97c4267a9581e4d87a2eee82a396c518acbf966. 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/FR9W11820068.
La Carpinese (Tarentelle de la région des Pouilles)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca34500193bab486b4316c40878b032abc2d5e91784357691d35a9c1e5f4102f. 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/FR9W11820069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x634435d883cc5470a2e7b8ce3c3d0b0c315195cf56b5db83007a71a1c438630e. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR9W11820070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe036376a4b71cce806d5d108e0d8488a8e1aed80caf701a4b725ab57bb6c1de2. 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/FR9W11821081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23cb33ec92cedb478c1ba44f2fa9245c7a251990cd036335ffebfcfb7b83779a. 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/FR9W11820072.
Sonate pour 2 violons in D Minor, RV 63 "Variations sur La follia d'Arcangelo Corelli"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x552184b8b14345e05daff3fcfa10fbceddb8a3117ecf0d5097b245fff9329b67. 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/FR9W11820073.
Tieteberga, RV 737: Sento in seno (Aria)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4e2f288a17db201d95aedf6e2d8090ab9a2cd7f27bece55a36e0184194542f8. 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/FR9W11820074.
Juditha triumphans, RV 644: Si fulgida (Aria)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61cf26a8d1de46da570ae386f9c6a4da24de4936d218e388adbdfa6efc05415d. 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/FR9W11820075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40eef5c28bc2535cc23c461408529c8cf1917af4e7bd0552870fd37fadf53e2b. 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/FR9W11820076.
Belle Virginie: Musique pour la nouvelle France
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9f9ba61cc3168f418144a52309358fb5086cea31544492a90c6df11fbc25437. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USDY42253282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a8e38aee09555834e559e69b3cbeab1af49d24e65c790c9a69f8352023ea13. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USDY42253284.
Scarlatti : Il martirio di Sant'Orsola, IAS 191
Alcina, HWV 34: Sta nell'ircana pietrosa tana