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 0x06969bdf0dd21e0b82384d033fdecb6ed171c41f0835b1ec7aac500fd1cc84cf. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/17a9b37a-4b51-41f5-bded-a7d6d8731b6a.json and https://artists.proofprofile.net/proofs/artist/17a9b37a-4b51-41f5-bded-a7d6d8731b6a.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
El Orfeón Donostiarra en Su Centenario (Vol. I)
The Barber of Seville: Act II: Contro un cor che accende amore
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 0x93161abc1fe5d96f6ea251929f25598566916467b313aec44e683307460855b2. 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/USSJ10915009 — a six-check JSON result.
Die Zauberflöte, K. 620: "Der Vogelfänger bin ich ja"
Sudwestfunk Symphony Orchestra Baden-Baden
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff590b491166dcf3ec597595a7321f8a2b23910da4c0effa3a90a3d1c283ed1. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR3KD1505413 — a six-check JSON result.
Die Zauberflöte, K. 620: "Bei Männern, welche Liebe fühlen"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89d4d4c58b3eaf0649482e355ec3fae8fe15c09098909d2227d087ce9f57c2ce. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR3KD1505414 — a six-check JSON result.
Die Zauberflöte, K. 620: "Ein Mädchen oder Weibchen wünscht Papageno sich"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x487c29a8cc00bcff16f534a4f24801f66ff1d421e9e71b08e369710eb04bb312. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR3KD1505415 — a six-check JSON result.
Die Zauberflöte, K. 620: "Ach ich fühl's, es ist verschwunden"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1105bde34d1604d0b8a98168702a9653b0ede1600c427805e95c891f07f47a40. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR3KD1505416 — a six-check JSON result.
Die Zauberflöte, K. 620: "In diesen heilgen Hallen"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc96c1c606c5e4eea735ed716435a39dcee566fec89035a18daab7452b1d83cbf. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR3KD1505417 — a six-check JSON result.
Die Zauberflöte, K. 620: "O Isis und Osiris"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c056136a180059492216ac44f2a9bcfc42c71b3add1305c4297a85a2875e86e. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR3KD1505418 — a six-check JSON result.
Die Zauberflöte, K. 620: "Chor der Priester"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eef9a29acbb49d2209b9b336e7ebb883732280ca00f85f3653328590f091bdb. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR3KD1505419 — a six-check JSON result.
Die Zauberflöte, K. 620: "Marsch der Priester"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x043604cc0c67e217182ae031ec27643c8615f1eb77ccacf7e75545cb60021665. 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/FR3KD1505420 — a six-check JSON result.
Die Zauberflöte, K. 620: "Dies Bildnis ist bezaubernd schön"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16e1812b33ffbc7119ea9953fdf1ad38ce4ea8a5656a3dc4ed7a8727864844b3. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/FR3KD1505421 — a six-check JSON result.
Die Zauberflöte, K. 620: "O zittre nicht, mein lieber Sohn"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40d959b6025f8a569602488acb0d6a2378400c8ef498228f69596a8b5c9da37a. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR3KD1505422 — a six-check JSON result.
Die Zauberflöte, K. 620: "Der Hölle Rache kocht in meinem Herzen"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2475e7f35c099c4f1a472d255603feaef3b93574477d78ac3acef4ccb200fe1. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/FR3KD1505423 — a six-check JSON result.
Die Zauberflöte, K. 620: "Papagena, Papageno"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c7672bf9afc9de55eb70445864d980ed4ef733031a3a11c215e4c2ddc6ae6b2. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/FR3KD1505424 — a six-check JSON result.
Die Entführung aus dem Serail, K. 384: "Martern aller Arten"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f632e46e7a3a818dc235c2430619ab0b03042b179796a21da6558cfa0b3acf5. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/FR3KD1505425 — a six-check JSON result.
Die Entführung aus dem Serail, K. 384: "Marsch der Janitschare"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8bed6b29ebc734166a28e4b18f6091359a3431cf768be321c5423a16d2d401f. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/FR3KD1505426 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafc78c7debf596c9ffff8038089bcd334765ff4a39b7c3b216fef213d16df9ae. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR3KD1505474 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd13d3a0033d971617217c7c29fb32a8134bd06166aa8c1ff3d076305ff97fed7. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR3KD1505475 — a six-check JSON result.
Cosi fan tutte, K. 588, Act I, Scene 1: "La mia Dorabella" (Ferrando, Guglielmo, Don Alfonso)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc948b654678e6cfbcb0000ff1a83d531db955e56cfad28c6921073dd1be26298. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR3KD1505453 — a six-check JSON result.
Cosi fan tutte, K. 588, Act I, Scene 1: "Una bella serenata" (Ferrando, Guglielmo, Don Alfonso)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85d712c74ca402e40f13bb1197a3cc310c5a4c5683bb95b5116a55f5c598e313. 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/FR3KD1505454 — a six-check JSON result.
Cosi fan tutte, K. 588, Act I, Scene 3: "Vorrei dir" (Don Alfonso, Fiordiligi, Dorabella)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1f3dcc00311931d3fc13cdd8fd70ee41ece4cec172314e33d804ab2e807383b. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR3KD1505455 — a six-check JSON result.
Cosi fan tutte, K. 588, Act I, Scene 9: "In uomini, in soldati" (Despina)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b2756da5c1abf944023486f46d9264fee80755eb093a073b5f31c6115b9b22. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR3KD1505456 — a six-check JSON result.
Cosi fan tutte, K. 588, Act I, Scene 9: "Smanie implacabili" (Dorabella, Despina, Fiordiligi)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb775dbd83645224071b3baf0bba31d7bdec4704fa19864caf7d91233f9c5b00e. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/FR3KD1505457 — a six-check JSON result.
Cosi fan tutte, K. 588, Act I, Scene 11: "Non siate ritrosi" (Guglielmo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9ef01ccad305a13cab82c23d791035e78926437bbb59f2c97dbb27c2babc1d9. 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/FR3KD1505458 — a six-check JSON result.
Cosi fan tutte, K. 588, Act I, Scene 12: "E voi ridete?" (Don Alfonso, Ferrando, Guglielmo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf50b0be3e57dd7c92ed5cd023852b8d2d21dec0b1601e64f6a5385d0097d6234. 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/FR3KD1505459 — a six-check JSON result.
Cosi fan tutte, K. 588, Act I, Scene 11: "Temerari, sortite… Come scoglio immoto resta" (Fiordiligi, Ferrando, Guglielmo, Dorabella, Don Alfonso)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f1367eb76b3744058cf55cb4a3cd5a180c7a55de393798c435b956de50ef316. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/FR3KD1505460 — a six-check JSON result.
Cosi fan tutte, K. 588, Act II, Scene 1: "Una donna a quindici anni" (Despina)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07b6195e495d19b82f723629f59e047613034073a633d0afa014e54f8b112e0c. 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/FR3KD1505461 — a six-check JSON result.
Cosi fan tutte, K. 588, Act I, Scene 12: "Un'aura amorosa" (Ferrando)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9204e95dd3b07874c75dff10ecaf3bfbc0d8e8631651f3f0b1d883a6d05b99b1. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/FR3KD1505462 — a six-check JSON result.
Cosi fan tutte, K. 588, Act II, Scene 8: "Donne mie, la fate a tanti" (Guglielmo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93cd3e3ef9d0916485c49e0e3ab2b8a9a18d222d841f1cf161d590cb759e73da. 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/FR3KD1505463 — a six-check JSON result.
Cosi fan tutte, K. 588, Act II, Scene 11: "È amore un ladroncello" (Dorabella)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8315a1cb3f08f9855141f3befa858911af40feb365d6327057cc7ce6b25a8dc. 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/FR3KD1505464 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x129c7575052f2751bd58435d060dffd8da256020294328657673dd68c4940d39. 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/FR3KD1505465 — a six-check JSON result.
Don Giovanni, K. 527, Act II, Scene 2: "Ah pietà, Signori miei" (Leporello)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a53cc70fac639f514ed56ed9c7e1a3517e29699dc3aedade8d381e5989033a9. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR3KD1505466 — a six-check JSON result.
Don Giovanni, K. 527, Act II, Scene 2: "Il mio tesoro" (Ottavio)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22085a83fd6ac6b887d805396c2ff284865142f3d2e692cf4fe156f2ea7e2ae1. 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/FR3KD1505467 — a six-check JSON result.
Don Giovanni, K. 527, Act II, Scene 2: "In quali eccessi" (Elvira)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5e238a37e7f70a76c57267f86772a6fa90a3494b16adf0da0282446ab454294. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/FR3KD1505468 — a six-check JSON result.
Don Giovanni, K. 527, Act I, Scene 3: "Ah, chi mi dice mai" (Elvira, Don Giovanni, Leporello)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6585abf33177664d8cee05aecf55c8a8c2b5f232f150fae53354dc04dbec9dd7. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR3KD1505469 — a six-check JSON result.
Don Giovanni, K. 527, Act II, Scene 1: "Vedrai, carino, se sei buonino" (Zerlina)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93fe268cf158e8b06511aa9d81f4bbf1a67f02a6af3405c6df2897819958905e. 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/FR3KD1505470 — a six-check JSON result.
Don Giovanni, K. 527, Act II, Scene 17: "Meta di voi qua vadano" (Don Giovanni)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x646209fc73e2f8507ec347aeb60d158fbaea2512b584965e05951c6fc07ae9dd. 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/FR3KD1505471 — a six-check JSON result.
The 100 Best Classical Masterworks: Great Opera Moments
Tannhäuser: Pilgrim's Chorus "Beglückt darf nun dich"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f4b9b21f8be812aa277ff03d9ff6be9c865829b51302f6b72645fe3b92080d2. 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/DEBL60778631 — a six-check JSON result.
Mozart: Cosi fan tutte, K. 588 & Don Giovanni, K. 527
Dioses de la Música - Mozart - Don Giovanni