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 0xc8299270a640fd06e610740c313ebddda49946585f90270a9ea7a6ab24b08a02. 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/6ca4df99-5fd7-4f98-b35d-2eb9b243d028.json and https://artists.proofprofile.net/proofs/artist/6ca4df99-5fd7-4f98-b35d-2eb9b243d028.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Rachmaninov: The Bells/Spring/3 Russian Songs
Le nozze di Figaro, K. 492, Act I: Overture
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 0x6b9247635577149f79a7dd193c2fc5cb77b28f2218534d3d076c6ed2b160d167. 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/HKI190348101.
Manon Lescaut, Act I: Donna non vidi mai simile a questa!
Belgian Radio and Television Philharmonic Orchestra
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab5213d6a14a180866aee7ad3aeb1fa45b9274c357a2cb301f3fdebbc8a7bcd. 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/HKI199290107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02d563709318ec90680026dd48ec4e3ab816d290066c4d4aff352fba8c1c1f14. 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/HKI190301808.
Le nozze di Figaro, K. 492, Act I: Aria: Non piu andrai, farfallone amoroso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31bd9a92eecd30dc32a0c2a9f4ec88d7fe97feb2f8865ded3b2953c4035d13e3. 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/HKI190348120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc910e47fb31b3fd2fd5f9fcb401bc07461314c13406b10a6fc5d460f81bfc252. 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/HKI190159310.
Carmen: Carmen, Act II: Toreador Song: Votre toast, je peux vous le rendre
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8883b1a6d19fb9880e337a5cf3cd641bfb1e3d798039f554e3e0e6905c9b83a. 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/HKI199220606.
Die Zauberflote (The Magic Flute), K. 620, Act II: Der Holle Rache kocht in meinem Herzen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ca1f93242ab74332c23515d22d541842226c49c73cefbb40ab13710d92e888b. 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/HKI199490208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56bf3b30fdfc0431b081fb35d8a0ec17481a24fa729bfc43b3b3f1838d9ae917. 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/HKI190316406.
Madama Butterfly, Act II: Humming Chorus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b71b6ec6e797b1206620e6ac1341eadf329256192619da73e4306d7e53040d0. 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/HKI199287411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4cda9532a65dad285bc7a9fbfc66a7efd51afad7afc59ea1197fda3b5fe2c02. 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/HKI199092209.
La Wally, Act I: Ebben? Ne andro lontana
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x769e720285311ad46195857586275f62c60484b3cfc3a30c76166077fc1878d8. 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/HKI199310904.
Pearl Fishers and Other Famous Operatic Duets
Lakmé: Blumenduett (Lara Croft Tomb Raider): Lakme: Dome epais, le jasmin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e95f2c95be7ce4a824c9e8de3b7cb011289a7c00f813dd7af4a16bd3be69dfa. 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/HKI190110703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc307e26e090484b4b7a357b97d8ea716336a2ccb2d21ade1b5642e00e00222ff. 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/HKI199400503.
Madame Butterfly, 1. Akt: Vogliatemi bene (Mona Lisa): Madama Butterfly: Viene la sera
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0218dd7a42b5efdb9db0e80ee3562cde229a39468dfb9e00023ed33d4d07a2a6. 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/HKI190110706.
Nessun Dorma And Other Favourite Italian Tenor Arias
Manon Lescaut: Act I: L'amor? ... l'amor?!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3107172f9b659992ea8645cadfe7aa5588e35360e4038a27dd68ed65cf329a89. 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/HKI199290102.
Manon Lescaut: Act I: Tra voi, belle, brune e bionde
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69e7ed7bfdfe4cdf69ea375c7f73825d9e043d64263a7ee3c1abaa04779501df. 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/HKI199290103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b8a0fae9be9e754664d3add3bd15443cbad73d5999d7f821f04f401686b1cbe. 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/HKI199290104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc9dac1b97d9d364b188a96ce2bc87c49d238e82de5f73aaf43e8a437b771c7c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/HKI199290204.
Manon Lescaut: Act I: Descendono, vediam! Viaggiatori eleganti, galanti!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ffd93b398be34a8c128723ca1656604fa6aa03d2e4e07f55149743a6ad82723. 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/HKI199290105.
Manon Lescaut: Act I: Cortese damigella, il priego mio acettate
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x778945ab1d106507e298408048540908095fbf71f551a292a19ac7b52c286a1e. 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/HKI199290106.
Manon Lescaut: Act I: Donna non vidi mai simile a questa!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab5213d6a14a180866aee7ad3aeb1fa45b9274c357a2cb301f3fdebbc8a7bcd. 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/HKI199290107.
Manon Lescaut: Act I: Vecchietto amabile
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe37a0f30854e28d1f8c5bd62b64e7888e6fb8ee102f40158a42890d1b8138146. 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/HKI199290109.
Manon Lescaut: Act I: Vedete? lo'son 'fedele
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aa5ebcb5aa6e6a16be786f09047db911543953c019813c9ba75264ef32cca52. 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/HKI199290110.
Manon Lescaut: Act IV: Sola, perduta, abbandonata
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71a332f6df1748a6e9011ca3e2ce3be10732348176f5cbe275c134c4e1a27ed6. 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/HKI199290213.
Manon Lescaut: Act II: In quelle trine morbide
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde056bea8a4fd2e816b7a25fab3965ec5aa55a519159f29123714b48319ed0de. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199290114.
Sinfonietta: 4. Allegretto - Adagio - Presto - Andante - Presto - Prestissimo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15da6274325f82fef598f505120ca34c25f8c62f1bf34145ec27d3730f79d61e. 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/GBF079111804.
Александр Бородин: Князь Игорь - опера в 4-х действиях и прологе (Серия Шедьоври на руското оперно творчество)
Puccini - Rossini - Verdi - Saint-Saëns: Selected Works