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 0x97f75e04d206a9e3e434619cd5f6640f3da35f8901079e6291fd68416daa4666. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1cd646e5-e589-4a8b-83b2-265422dea8f7.json and https://artists.proofprofile.net/proofs/artist/1cd646e5-e589-4a8b-83b2-265422dea8f7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Arte Nova Voices - Franco Fagioli / Portrait
Stabat Mater, P. 77: I. Stabat Mater dolorosa
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 0xb720a78101cbe2057b063025b87e9a5a83734240bc0641fc045704dc9e2caaf5. 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/ITV701820001.
Italian Operatic Overtures, Vol. 2: The Early 19th Century
A Guided Tour of the Romantic Era, Vol. 8
Pergolesi: Il prigionier superbo, P. 143i & La serva padrona (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00bd2a28ceec3540145f40c5747b6ef0a72e309d4046e999c3ed3d8e04744d9b. 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/ITDQ79221144.
Violin Concerto in B-Flat Major (arr. G. Catalucci violin and chamber ensemble)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0ddc206c7bba5e0ed3479b751dff7689a93ae3beb1650209e0523e545bf77d3. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/ITDQ79221146.
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
Bach: Tilge, Höchster, meine Sünden, BWV 1083
Mozart: Famous Sacred Works & A Little Night Music, K. 525
Perosi: L'entrata di Cristo in Gerusalemme
Domenico Cimarosa: Il matrimonio segreto
Le Nozze di Figaro: Atto primo: Ouvertura
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4b15189ae17ff189f55c51a0c483abb7f7e976ad2562a5c1cb909b46408a995. 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/DEP620001383.
Le Nozze di Figaro: Atto primo: No. 2 Duettino (Susanna, Figaro): Se a caso madama la notte ti chiama
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f361361948dba29e7ec023e3755a9b0834ded365c6eb13437e1020ab741f1e3. 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/DEP620001386.
Le Nozze di Figaro: Atto secondo: No. 14 Duettino (Susanna, Cherubino): Aprite presto, aprite
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2e9f8e821f2dc606d94c58cc5b365d010708e3a4572a61e4458eeb3f8122550. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DEP620001413.
Le Nozze di Figaro: Atto primo: Recitativo: Or bene;; ascolta, e taci!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8498bbbb644c5fa4680414b1a99c3cd18c71bb46a90ec5e16d0a15ee1cbbb2e6. 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/DEP620001387.
Le Nozze di Figaro: Atto primo: No. 3 Cavatina (Figaro): Se vuol ballare signor Contino
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a0e6bb9f4996a1199018b8b68c599f274e0ddb5784248d4d709e0400da209e. 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/DEP620001388.
Le Nozze di Figaro: Atto secondo: No. 15 Finale (Susanna, Contessa, Marcellina, Basilio, Conte, Antonio, Bartolo, Figaro): Esci omai garzon malnato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xded2b7007ceed95ad8173678bc47c302dc5a24c586504364e988c991c04a402b. 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/DEP620001415.
Le Nozze di Figaro: Atto primo: No. 4 Aria (Bartolo): La vendetta, oh la vendetta!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6cabd16928d8fcf904745e680939cf5a04e52eb910fdde153ad0c1267313822. 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/DEP620001390.
Le Nozze di Figaro: Atto primo: Recitativo: Tutto ancor non ho perso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe27d1e7861e023f5e226a586ddf347b0929650546e0073d8e7656248d7795de3. 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/DEP620001391.
Le Nozze di Figaro: Atto secondo: Conoscete, Signor Figaro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe17087e2baa9cca5183a301ddad67837d700bbf13eb3917628bf55dd03afd84a. 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/DEP620001418.
Le Nozze di Figaro: Atto primo: Recitativo: Va'là, vecchia pedante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x140dd062d9415181e952e6e516fddd023d52831d8a3adf563216297861e8ac55. 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/DEP620001393.
Le Nozze di Figaro: Atto primo: No. 6 Aria (Cherubino): Non so più cosa son, cosa faccio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a2e21770b69ebfd68be8df6b89b0de7ae5dfcd652703f8ad88540f0e0e909fc. 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/DEP620001394.
Le Nozze di Figaro: Atto secondo: Vol Signor, che giusto siete
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x949050715b4ca48fe9590620553487e110033f66f45be6d88cc4c36fbd9d8575. 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/DEP620001421.
Le Nozze di Figaro: Atto primo: No. 8 Coro: Giovani liete fiori spargete
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46d45b85fd0a7341a9f24e424f289fa1e55206a4e6fd6f62a3e1578585cc1c32. 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/DEP620001398.
Le Nozze di Figaro: Atto primo: Recitativo: Cos'è questa commedia?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x216aaa0d4cce1690031e2fd74d578594b2668374257da9f2984606bc68920f18. 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/DEP620001399.
Le Nozze di Figaro: Atto primo: Coro: Giovani liete fiori spargete
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe71ca1983ae9e02700c521fbbbe9c15393392a6324548d2f9a370b0bf4789ead. 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/DEP620001400.
Le Nozze di Figaro: Atto primo: Recitativo: Evviva!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x078b8af49de36b33b3ce02dcb3267fa0e9e4b8d7ab389e5336f889b1f51be057. 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/DEP620001401.
Le Nozze di Figaro: Atto secondo: No. 10 Cavatina (Contessa): Porgi amor qualche ristoro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17128c2af17b1832ad86c34e90be43cd58b2e9c93a0371e6b70c1495361b2407. 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/DEP620001403.
Le Nozze di Figaro: Atto secondo: No. 11 Arietta (Cherubino): Voi che sapete che cosa è amor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8eb13f10a10322c1c9eca91a3b9c9094d0691d679a31f2ce13922305a4c42eb. 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/DEP620001407.
Le Nozze di Figaro: Atto secondo: Recitativo: Bravo! Che bella voce!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4643d9e32f45094f7517e05f60b2f0ca182dec9eb0cfbc3a6a8857a4d079b3f. 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/DEP620001408.
Lucrezia Borgia: Prologue, Scene 1: Senti! La danza invitaci (Chorus)
Il Coro Lirico Marchigiano “Vincenzo Bellini”
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d2bef0754ab240de3cde37dffc07152bd4cf32bc2c835dbbcb89bae593c42bb. 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/ITDQ71225604.
Lucrezia Borgia: Prologue, Scene 3: Maffio Orsini, signora, son'io (Orsini, Gazella, Petrucci, Liverotto, Gennaro, Lucrezia)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe39aeac58302ada6c4807596bec2b98bbce39091d5c763dc76f5c6c463cf4617. 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/ITDQ71212560.
Lucrezia Borgia: Act I: Finale: Infelice! Il veleno bevesti (Lucrezia, Gennaro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91e0617eeb93f66502c2d253f17f6681450b3c7a139078fc48ca3979feac231a. 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/ITDQ71225613.
Lucrezia Borgia: Act II Scene 8: Figlio! … Era desso il figlio mio (Lucrezia)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x554a5975e6cf52bbd953c982e0f7a6567389387d97593a36f4e16fc9a396795b. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITDQ71232561.
Lucrezia Borgia: Prologue, Scene 3: Com'e bello (Lucrezia)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76210a511436c1a20021cb5bb6051e9b7b26260fd9259982ea327978625abaa8. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/ITDQ71225606.
Lucrezia Borgia: Act I Scene 1: Vieni, la mia vendetta (Duca)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6411a37c66220c72b9dbf1d036988ab5d09cfa40cae3de65bb6ada1808a4d98. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITDQ71232560.