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 0x9ba4edf79d7df53b1dede76bd44684d586cb31ca11bcdb982bd59ab4f621031d. 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/a95baadf-be4e-44a3-ba55-cb236e163066.json and https://artists.proofprofile.net/proofs/artist/a95baadf-be4e-44a3-ba55-cb236e163066.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Klassik für Babys (Traumhaft schöne Melodien)
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 0x54840582141c78d7061783e8176233d74ae25f68a455c56596d9d132fd45a289. 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/DEB691056112.
Violoncello: Nora Samandijev, Klavier: Barbara Rektenwald
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x963f6e9edccf85deb0eb1db1d724e242c68ffc5ee342b49111a28c1fc538df2d. 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/DEB691182509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x052146eb9b362a1d9c9a9ef16a95d82fca6371ed6c0a001a43fc5cd57fb3e287. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/DEB691431646.
Kodaly Quartett, Kontrabass: Istvan Toth, Klavier: Jeno Jando
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0911e383263945605d2fb6d0039de7da7e19eb16e2773cf2d5681afcbd8235bf. 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/HKI199300304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb04a15e99c78966d1ffdbb67e337444ea886bc7bc1c43a43eee4ef1d86c49aa7. 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/HKI199225309.
Mozart für Kinder. Nachtmusik und Zauberflöte
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d0b8f7625fcf8d675f95f1e5c74624467727ade896cf19bbf8f23eae0f4f4f8. 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/DEB691307401.
Eine kleine Nachtmusik, G-Dur, KV 525, 1. Satz Allegro (Ausschnitt)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94cd49c86a10382de7906a5aee67eaa0dbb689b8a9f6f171913f9028e3c73b88. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/DEB691307402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf516010ef8655131f821a10d2a0e347995773777d32bc78cd9189d966b54e721. 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/DEB691307403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90591b507b62caf9787941141678d404ceec6b59edc4d90a42827f1a8aaa7ccd. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB691307404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd61b472517ca6b2309b2d7bf17a06c08d0ae33a4f4cd157737ab5630e742c7c7. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB691307405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc51cd66b1b34b83732e16ad9fb3400107110210460267e34e943219e374c5006. 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/DEB691307407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e11497f6ce35c232a395f3698fd319bdad6b161196e50f641ce0d709dfeafe. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/DEB691307408.
Sonata Facile, C-Dur, KV 545, 3. Satz, Rondo. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f142fc7f7d0832c4d770f6ad504f29394b657724e6944063d4b6b91d2e4e7ef. 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/DEB691307409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ec86241ab99db89c8c1e51a8df73b992392ecf309df7f8fe8467b111a36fe63. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB691307410.
Eine kleine Nachtmusik, G-Dur, KV 525, 4. Satz, Rondo. Allegro (Ausschnitt)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb77a2dd8f16ef07d0d1a8f76dc3ac38da8c1a36dd763163f1d44a231317999e7. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/DEB691307411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa74e2531c27df0d520e8e70217aee529fcf9b793d9dfdfd57b5c2ee2a222ecb3. 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/DEB691307412.
Sonate A-Dur, KV 331, 1. Satz, Andante grazioso (Ausschnitt)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d4670ce0bbf3715d137975d3e56d8f9dfb4440ec6a69c1753961fdbd4cd3d74. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB691307413.
Nach der ruhigen Melodie ein schnelles Stück
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd9b14c3dd9f6b04a0242b04334899586dd474350fa47d1221a43efe5707511. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB691307414.
Sonate A-Dur, KV 331, 3. Satz, Rondo alla turca, Der türkische Marsch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb052730d9390730f29bbd0622c670c84c02f2d0db728b56be34aad17a4a765e1. 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/DEB691307415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90762d71b890db77278fbe0071920237586862be6090b07f1f964ba342e0a3c7. 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/DEB691307416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87a0becf496ef534a57aeda7a1c19767fccec5198b7e7086b016dd514a2ada4f. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB691307417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1dd7fdf02de5dae3ed9475dce24fe624c3c8bf0cf5de07a5872450e56fae4e1. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB691307418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54dc6fbcd5104243d1a8c355ead800bc5f1421d48609fa92007a21302afe6dca. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/DEB691307419.
Komm, lieber Mai (Sehnsucht nach dem Frühlinge), KV 596
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x306a2716c139686fbfb4f17e2697089d5389c4ddc65d873ae6d0bb9622e58c35. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB691307420.
Viele Opern, zum Beispiel Bastien und Bastienne
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5c1a2f401ec01720f56575c3c572b5faa2952c4e571c4b77dfb688255f29073. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/DEB691307421.
Diggi, daggi … - Zauberer Colas aus Bastien und Bastienne,KV 50 (46B)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe42dd8f2bccc0df25a83ff598b763b3110112dd38b32f6e3c0194cba02906d2. 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/DEB691307422.
Die bekannteste Oper von Mozart: Die Zauberflöte
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e1610ceefcdb1bf235294c4dc57104a15424832a1c8aced1c0614f9aec0a8ce. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB691307423.
Der Vogelfänger bin ich ja aus Die Zauberflöte, KV 620
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d637c6e7e4016f1c3bf0fe9855d51af7bb2187c8d59a94c0afdfbf43c5d815e. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB691307424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcedc38e667a5ba3c2cb4ede414008e761a31121e1b2791932d46c45bfba52b7a. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB691307425.
Pa-Pa-Pa-Papagena aus Die Zauberflöte, KV 620
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x809b5fddabf4c53c11fe26f7e1fd751f51a7857020a726f5980cbe3bc5cbc6c6. 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/DEB691307426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e8dc29a724a62065a34da4dc88bb413b4f9dc848ffc0c6e14f6455af7b9bbe. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB691307427.
Eine kleine Nachtmusik,G-Dur, KV 525, 3. Satz, Menuetto.Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26997e02e05e629ddab49fca3c1c84fa8ef26acb861e71cffe0c7226f3ebd843. 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/DEB691307428.
Nightmusic and Magic Flute. Mozart for Children