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 0x9ac6185dd7d5023c416afffdb7cf0d1ff997dd77f8e47a656b5c0a981cf85d35. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9207bfaa-d7db-454f-a3c6-a0e3635ae908.json and https://artists.proofprofile.net/proofs/artist/9207bfaa-d7db-454f-a3c6-a0e3635ae908.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Mozart: The Magic Flute (Highlights) – Queen of the Night Arias
Schubert: Die Freunde von Salamanka, D. 326; Der Spiegelritter, D. 11
Die Freunde von Salamanka, D. 326, Act I: No. 5, Trio. Lebensmut und frische Kühlung
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 0xae7e09010552227968cb4a74f8ca56b731ec26d9476e01c7569f6eb69ca48dfb. 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/DEF057831306.
Mozart: Zauberflöte (Die) (The Magic Flute)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7414431d84c5fe09e18c823d11658b217920511535fd6dae67935a30d6614d1c. 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/HKI199490101.
The Magic Flute, K. 620, Act I: Zu Hilfe! Zu Hilfe!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x556c3743def24b34ca16372d6f88625ee986045da055079cfaaf6e6499bcd029. 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/HKI199490102.
The Magic Flute, K. 620, Act I: Arie. Der Vogelfänger bin ich ja
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac71e3358daa805ef5af065f0227f5dbd673db42442ce2a94b6247098808906e. 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/HKI199490104.
Die Zauberflöte, K. 620, Act II No. 12: Quintett - Wie? Wie? Wie?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6de7b8a884320c165c6b168a30a427a2f70894a55d75b1e093a7b9b02c48f1b. 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/HKI199490204.
Die Zauberflöte, K. 620, Act I: Dialog - He da!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4fe367eb9cbc0fb9738ce7194e4f553b7a194d5ef312feada4df6270f8a6ade. 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/HKI199490105.
The Magic Flute, K. 620: Dies Bildnis ist bezaubernd schön
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb06ea5e8d6c5bded8b294fd7612fb14a1afb499c7441fb815c3df1b88b16956. 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/HKI199490106.
The Magic Flute, K. 620, Act II: Arie. Alles fühlt der Liebe Freuden
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9dfeee69b1daea9cdfaea7aff6035a25d68088d30c1c56175e2e26870db57d7. 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/HKI199490206.
Die Zauberflöte, K. 620, Act I: Dialog - Ruste dich mit Mut und Standhaftigkeit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe46dabe80f3a01702e4efe5dce90534dea2183de45efed57778525d155b0c9d9. 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/HKI199490107.
The Magic Flute, K. 620, Act I: Rezitativ und Arie. O zittre nicht, mein lieber Sohn!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01ed3ad604eec020beb6f897ed586d59374abe2177e03d40e44b4b161e8b0d2f. 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/HKI199490108.
The Magic Flute, K. 620, Act I: Quintett. Hm! Hm! Hm! Hm!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc3c5fb68dc25539eef1915a862010bc9abdf847740467e029382b040a27ec68. 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/HKI199490110.
The Magic Flute, K. 620, Act II: In diesen heil'gen Hallen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaab9af2e2a541450721b42a28fbed0071b7cff906c974cd2a4af0cb1c886557. 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/HKI199490210.
Die Zauberflöte, K. 620, Act I No. 6: Terzett - Du feines Taubchen, nur herein!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b822d01b36b34ad408d10eaa82bda9d6dfb17660e438de8de28a7827bea0c90. 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/HKI199490111.
Die Zauberflöte, K. 620, Act I: Dialog - Mutter, Mutter!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc88c60b7c61e2f54329c7a0b9678e9b7fcd17bc97cd6a4f28bc1a5073f2d7a3. 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/HKI199490112.
The Magic Flute, K. 620, Act I: Duett. Bei Männern, welche Liebe fühlen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2973c3b7fee73d357fddd371ad54e2ad7feb45817118cf3c720b1ea3a04378f. 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/HKI199490113.
Die Zauberflöte, K. 620, Act I No. 8: Finale - Zum Ziele fuhrt dich diese Bahn
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc53c68ad3fe92d9557a76e5f027d0b954538847458f4e397e8fedd2fe62086c. 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/HKI199490114.
The Magic Flute, K. 620, Act II: Ach! Ich fühl's, es ist verschwunden
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6620b33639462e1c5469f2c48049c3e5761e0c0afde41495a0931374cad9bf6e. 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/HKI199490214.
Die Zauberflöte, K. 620, Act I: Rezitativ - Die Weisheitslehre dieser Knaben
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5f0d856653482aec992896acb09881184cddbc580e87e9cb300e59e26e633b3. 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/HKI199490115.
The Magic Flute, K. 620, Act I: Wie stark ist nicht dein Zauberton!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x357177cc796fb749cee6fd909bd7e050c0a025b7e3d00f949c9602856ca50d36. 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/HKI199490116.
Die Zauberflöte, K. 620, Act II No. 18: Chor der Priester - O, Isis und Osiris, welche Wonne!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90d0a723b621a74c288148f4652c6ea07ce1ac67c21e5e39cbd8ef2a00623956. 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/HKI199490216.
The Magic Flute, K. 620, Act I: Schnelle Füße, rascher Mut
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36889536da74d0edf8b6629b91bda98d9af8d20b9c755ff3fe4d35a523f25b58. 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/HKI199490117.
Die Zauberflöte, K. 620, Act I: Allegro maestoso - Es lebe Sarastro, Sarastro lebe!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2addba4f91e03a53da946e7908b21620ea70c3c5ceb56117871121af514fb23d. 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/HKI199490118.
Die Zauberflöte, K. 620, Act I: Allegro - Na, stolzer Jungling, nur hierher!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x563568a08bc8b2bf22cac31fa96153492c021335b5ff349ffd1fdbd25e8bfa8f. 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/HKI199490119.
Die Zauberflöte, K. 620, Act I: Presto - Wenn Tugend und Gerechtigkeit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e138813f25dcae7b09d148e0de206fe0f8fe34c88362d32d878ab9ae6bbb3e8. 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/HKI199490120.
The Magic Flute, K. 620, Act II: Arie. Ein Mädchen oder Weibchen Wünscht Papageno sich!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea360a2c6a560dad0b2c3ca6e286497ca5d9005b45a29799c1f2f5e02dac6a9. 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/HKI199490220.
The Magic Flute, K. 620, Act II: Marsch der Priester
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85da8b702b8f03dc0c8f4e487241e5d7579b2756dc7c0f299bbbcb30993278d1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/HKI199490121.
The Magic Flute, K. 620, Act II: Arie und Chor. O Isis und Osiris
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x116c7c16baec0fb107ac4a14f511e350c8013792973995b8ef5f1fb12accf3f1. 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/HKI199490123.
Die Zauberflöte, K. 620, Act II: Marsch. Adagio - Wir wandelten durch Feuersgluten
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4832f50ae29f40caad8e0afd6daa59817b0fa2f78b4e4715d25341bb59d905fd. 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/HKI199490225.
Die Zauberflöte, K. 620, Act II: Allegro - Papagena! Papagena! Papagena!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ec1a8fea74079a1e68dfa6731c3e29b83a6be53a0f93d4b71867badb26bc15b. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199490226.
Júlia Várady (Wiener Staatsoper Live 1993-96)
A Guided Tour of the Classical Era, Vol. 2