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 0xcb1f882e1a6007e6a055a7d40ebaa371deb0a1f109a8b653d925f6485f54d1b2. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a4c80f10-ef5d-487e-bb22-9396a5f60fa4.json and https://artists.proofprofile.net/proofs/artist/a4c80f10-ef5d-487e-bb22-9396a5f60fa4.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Puccini: La bohème, Act 1: "Questo Mar Rosso mi ammollisce e assidera" (Marcello, Rodolfo)
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 0x2c475466d1b59828e2b3607c7495077dbb50d334edddf75f4e2612859610f1fd. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC0200169 — a six-check JSON result.
Puccini: La bohème, Act 1: "Aguzza l'ingegno" (Rodolfo, Marcello, Colline)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeb02c99aaa88306830acb5a056ea109c14c653a2be28f08ac75b2297fa297e6. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC0200170 — a six-check JSON result.
Puccini: La bohème, Act 1: "Legna!" - "Sigari!" (Rodolfo, Marcello, Colline, Schaunard)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27cf1c79d13966056bf7b0d4fc7614cfc4b6c54b032b087f8e2904c64ba3f031. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC0200171 — a six-check JSON result.
Puccini: La bohème, Act 1: "Si può?" - "Chi è la?" (Benoit, Marcello, Schaunard, Colline, Rodolfo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x005c35da9d4880051894fc5814e3c9d7ecb1fb44c1c5067c5dbf3e3be58021fd. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC0200172 — a six-check JSON result.
Puccini: La bohème, Act 1: "Al Quartiere latin ci attende Momus" (Schaunard, Marcello, Rodolfo, Colline)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef38ba29c25a13e1bd6c413ec382a1a27826adb059be42269f07ff49f7e78dbd. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC0200173 — a six-check JSON result.
Puccini: La bohème, Act 1: "Chi è la?" - "Scusi" (Rodolfo, Mimì)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92d572b84b9d0fa826f8831c99c6b66a6947571669ef4e0fa8bc4b997942c0f3. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC0200174 — a six-check JSON result.
Puccini: La bohème, Act 1: "Oh! Sventata, sventata!" (Mimì, Rodolfo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93d571f046fee6bd3bdc39fd463427f3581f36f481cf3804719805a0638a6529. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC0200175 — a six-check JSON result.
Puccini: La bohème, Act 1: "Che gelida manina" (Rodolfo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5244cfd05777fa72ef0cf646f524246a47ead7a4d73da3fd798b25d67dcd48c5. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC0200176 — a six-check JSON result.
Puccini: La bohème, Act 1: "Ehi! Rodolfo!" (Schaunard, Colline, Marcello, Rodolfo, Mimì)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa324c55330d7358d97260c2b0b79725e74b6f0161a7b797c3cf89eb8f5b19898. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC0200178 — a six-check JSON result.
Puccini: La bohème, Act 1: "O soave fanciulla" (Rodolfo, Marcello, Mimì)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee27ff55b825b3ddd043a701cafeebcc7bb6e881027c08224a41a0804796d117. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC0200179 — a six-check JSON result.
Puccini: La bohème, Act 2: "Aranci, datteri!" (Coro, Schaunard, Colline, Rodolfo, Mimì, Marcello)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa86699f03f76eda9cc082d6d9f5a1e3cd5cfdece1795fbbb25dca1ace4854ee. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC0200181 — a six-check JSON result.
Puccini: La bohème, Act 2: "Chi guardi?" (Rodolfo, Colline, Mimì, Schaunard, Marcello, Parpignol, Coro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29f7da6ffa3071d7d33dad190f25c65916ef23cd36958cc430efcdfe34f730dc. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC0200182 — a six-check JSON result.
Puccini: La bohème, Act 2: "Viva Parpignol!" (Marcello, Mimì, Schaunard, Colline, Rodolfo, Coro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf235e0461c46c9c9e9fc08361d7095fa5d44a7e017e38179f64809f624a0b2b4. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC0200183 — a six-check JSON result.
Puccini: La bohème, Act 2: "Oh! Musetta!" (Rodolfo, Schaunard, Colline, Marcello, Alcindoro, Musetta, Mimì, Coro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9941233b145574ae9c2beb84ae5a5a09a4a8dd7a5047e6dd21918024e44c1b44. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC0200184 — a six-check JSON result.
Puccini: La bohème, Act 2: Valzer. "Quando men' vo soletta" (Musetta, Marcello, Alcindoro, Mimì, Rodolfo, Schaunard, Colline)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fcb95ebcad499d75bae313d00db15ee446b09ff67ee119003fa50430b534cf6. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC0200185 — a six-check JSON result.
Puccini: La bohème, Act 2: "Chi l'ha richiesto?" (Colline, Schaunard, Rodolfo, Marcello, Musetta, Mimì, Coro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x443758651c04960c3993b5394cdcad5e4b09bfba85bee7c9a3b06ca723abc7bd. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC0200186 — a six-check JSON result.
Puccini: La bohème, Act 3: "Ohè, là, le guardie!" (Musetta, Doganiere, Coro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae1c294c559c0e1fa09f47fbdad880d86512bf5af50aa4bf534763b499da73d7. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC0200188 — a six-check JSON result.
Puccini: La bohème, Act 3: "Sa dirmi, scusi, qual'è l'osteria" (Mimì, Sergente, Doganiere)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5301b9e393a8acae618f069760af7dda01fb387cdeba4a1b8ae5ebbba4f45666. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC0200189 — a six-check JSON result.
Puccini: La bohème, Act 3: "Mimì?!" - "Speravo di trovarvi qui" (Marcello, Mimì)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafe2145130d6ac6da3078e76112b673c881eb395de061635a17f7fba49e06cb3. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC0200190 — a six-check JSON result.
Puccini: La bohème, Act 3: "Marcello. Finalmente!" (Rodolfo, Marcello, Mimì)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b521c2f62399c891363ad414bcc1d1b83de4eae34df124e44b7d1d6e842d9b. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC0200191 — a six-check JSON result.
Puccini: La bohème, Act 3: "Mimì è una civetta" (Rodolfo, Marcello)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0ee8da032224150e17f90372ce2c610f69771becdcf31646c134d3d92338780. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC0200192 — a six-check JSON result.
Puccini: La bohème, Act 3: "Mimì è tanto malata!" (Rodolfo, Marcello, Mimì)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a5c5858290fe36b124c3a6dfb2cdd68e67709b84b7e96d322e13ff293c2082. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC0200193 — a six-check JSON result.
Puccini: La bohème, Act 3: "Addio" - "Donde lieta uscì al tuo grido d'amore" (Mimì, Rodolfo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc07a5672189704bd1dee9ec76dc00b7b7fd644773beb0a4edc9f5e31b5d5b8c. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC0200194 — a six-check JSON result.
Puccini: La bohème, Act 3: "Dunque è proprio finita?" (Mimì, Rodolfo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df205cccc05a2a92b2705849445f3d299863b184c66230a268f484157265cee. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC0200195 — a six-check JSON result.
Puccini: La bohème, Act 3: "Che facevi? Che dicevi?" (Marcello, Musetta, Mimì, Rodolfo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4dd950e73059b648b4ecf694949c50198a5029281a159c586777d54b254f1d2. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC0200196 — a six-check JSON result.
Puccini: La bohème, Act 4: "In un coupè?" (Marcello, Rodolfo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfeff0178248599c6a0f4d41cf9da99d541d15dc4694be908e732ee82fb98bf7. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC0200198 — a six-check JSON result.
Puccini: La bohème, Act 4: "O Mimì, tu più non torni" (Rodolfo, Marcello)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb76be0d1e58e8e0983e990fef3897eed776e2b584d46fe0c6eee0c0f6c3a93c3. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC0200199 — a six-check JSON result.
Puccini: La bohème, Act 4: "Che ora sia?" - "L'ora del pranzo" (Rodolfo, Marcello, Schaunard, Colline)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59df581c8da1d0d6eb6f1454c742159c2710bcce932965b01261ec399b525b20. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC0200200 — a six-check JSON result.
Puccini: La bohème, Act 4: "Gavotta… Minuetto… Pavanella" (Colline, Marcello, Rodolfo, Schaunard)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3357866a73a7d47103d3a49f09b5509ec1f9752daf3ad58c8e22ec58aea80663. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC0200201 — a six-check JSON result.
Puccini: La bohème, Act 4: "C'è Mimì… C'è Mimì" (Musetta, Rodolfo, Schaunard, Mimì, Marcello)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa42ba84e321ea260247f3c12b8ca8116f826f28cf0ecf4a84acb86373982e60f. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC0200202 — a six-check JSON result.
Puccini: La bohème, Act 4: "Ho tanto freddo. Se avessi un manicotto!" (Mimì, Rodolfo, Marcello, Musetta)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dc9accb9163c1dccfd38c0196ef93aba33ba8dfcb07028a7e01d71dea68536d. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC0200203 — a six-check JSON result.
Puccini: La bohème, Act 4: "Sono andati? Fingevo di dormire" (Mimì, Rodolfo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51c3d6439bad4fdeffedb427f796289e68f50c0e53ee209aea185ec4fc1858fa. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC0200205 — a six-check JSON result.
Puccini: La bohème, Act 4: "Mi chiamano Mimì... il perché non so" (Mimì, Rodolfo, Schaunard)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdb9a327f6917983b8fb5fd46ae4748e2f3a7c47446fb4e6fd9df03a5230045c. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC0200206 — a six-check JSON result.
Puccini: La bohème, Act 4: "Dorme? Riposa" (Musetta, Rodolfo, Marcello, Mimì, Schaunard, Colline)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00f80eda8444d7b5b1cb331e3778a2114e8a78682bf35ca5685b93f33cf07bc4. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC0200207 — a six-check JSON result.
Giacomo Puccini: La Bohème (Complete Recording)
Jussi Björling Collection, Vol. 4: Opera Arias & Duets (Recordings 1945-1951)
Romberg: Romberg Conducts Romberg, Vol. 2 (1945-1950)
Romberg: Romberg Conducts Romberg, Vol. 1 (1945-1951)
Festival of the Great Tenors (1933-1956)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x538103ff7c6622613b9565a36f2bb9c9c499b09a9137690b02e1cb3c78783390. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEAD60800922 — a six-check JSON result.
Tosca: Tosca, Act I: Quo locchio al mondo (Mit deinen Augen)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa971a03161dbdb12ced442848ef812e61df2262d6e9442aac78acc6940d64bc4. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEAD60800923 — a six-check JSON result.
Verdi: Don Carlo (Christoff, Filippeschi, Gobbi) (1954)
Leontyne Price - Great Scenes from Gershwin's Porgy and Bess
Porgy and Bess: Introduction; Summertime
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c26544b0b316421ce2167041d7266ce785185063c8b911bae421ca52dc2a83e. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USBC19802881 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c18e9c0a010a721e531501ccb2b002485f22a2e2ccde3a5ea0643ab63d32ac8. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USBC19802884 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e1ad7f230650ff0528035f2a56816d196367647b7c13ab59b60fb9c124cd048. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USBC19802887 — a six-check JSON result.
Great Scenes from Gershwin's Porgy And Bess
Puccini: Boheme (La) (Bjorling, De Los Angeles, Beecham) (1956)
La boheme: Act I: Che gelida manina! (Rodolfo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1850a0d44c62d9909579615430c350fba367cf6ff66aa386ba0964b218685ca3. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190700208 — a six-check JSON result.
La boheme: Act I: Si. Mi chiamano Mimi (Mimi, Rodolfo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb80378a8f8ed10133a7e2f07851986aa75d78bea979ed5837d1a55f0c035b4fd. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190700209 — a six-check JSON result.
La boheme: Act I: O soave fanciulla (Rodolfo, Marcello, Mimi)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b550ab370530c5302c51f1303131bf544e5f52abebf2d9185c751f4c640d4da. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190700211 — a six-check JSON result.
La boheme: Act II: Quando men' vo soletta (Musetta, Marcello, Alcindoro, Mimi, Rodolfo, Schaunard, Colline)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb623afc969d620e7c4ecfac9df0661c1b597f6db4be35e5119bd1b0dfc5f1ed6. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190700216 — a six-check JSON result.
Donizetti: Lucia Di Lammermoor (Callas, Di Stefano, Gobbi) (1953)
Marian Anderson - Christmas Carols (2021 Remastered Version)
Blitzstein: The Cradle Will Rock - No for an Answer - Symphony, "The Airborne" (1938-1947)
Récital d'airs d'opéras français (Mono Version)
Weill: Down in the Valley, Lady in the Dark