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 0x4b267f43ca63e3dc0825a2155c501a85464c870f98ff3333dafc21d872a7cd0e. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/974eb7a3-60f4-4bba-89a3-408cec13af0a.json and https://artists.proofprofile.net/proofs/artist/974eb7a3-60f4-4bba-89a3-408cec13af0a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0xb7d8c925f5bbf23f25fd68be26525d804af367ffaeab10eff19126e4ac66cdc0. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGJ1722123.
Porque Ben Santa Maria Sabe Os Seus Dões Dar (Csm 327)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29f1a4c0ff62dc2f0ed912b42fa45ea6a864dc2cffc71288e3de5315c788afa2. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGH1488337.
Festival de Música Antigua de Úbeda y Baeza: Selección de Grabaciones en Vivo (2000-2020)
Recopilador: Cantiga Tanto Quér Santa María
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6158d2b98b5a19957a3c62838ae9e3148ebf34ab83fba0ceb3c9e646b787466. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/ES5682100684.
Aus Tiefer Not Schrei Ich Zu Dir, BWV 38: VI. Chorale: Ob bei uns ist der Sünden viel
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c651e62714087a5de14d85ddfac0dd4010ec146735f6dbb124f801f1e2506d0. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/PT4KG2443001.
Schau, lieber Gott, wie meine Feind, BWV 153
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99801f4a78969ec9e22aa78b88b3624cd715281270a93d7e8e673092d1964cd0. 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/PT4KG2443002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72c2965f28dd8b39d4abc782ef9369fdb33c10d4e39844df56a8d75a63e815a9. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PT4KG2443003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34b0979fdc17cbcc1b4a22c8c0ab75d0892adbd67cea76f2b31e7e7cc3038f4c. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PT4KG2443004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13f888c7c58ff19e1ae5a2b287ebe042fb4d7e62ce29588ffd8f971fba8224a5. 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/PT4KG2443005.
Selig ist die Seele, BWV 87: VII. Chorale: Muß ich sein betrübet?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71d1870347f622ed4e1f07c185db1c419db212c2140a0d0b8f6fffdaf1684675. 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/PT4KG2443006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1acae07a4850f0dd17ab90c37014f9bab0f5bf7c02d42494d5e76ce918c3bda3. 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/PT4KG2443007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x961d200fa85bbcfa35c7efc37cb2cc1448bb86944ad79ed1fc1adf5bffc96033. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/PT4KG2443008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed0b68aa35d94ec66d612ddbdce8fe6c35d4b887b9db53edb18e9917112590e6. 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/PT4KG2303301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d5be1544f260a1083b04b870aa5f57218f82502aa473376dc157e4a325d2a32. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PT4KG2303302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe685c1a842e4ca78321b70381da8947756f41fec5023bbc803960c6ddbd517d6. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PT4KG2303303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ef1a89d56ad13cb5e308adf19c2299cb9bf37d120da1c6be258dcacc8c4eec1. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PT4KG2303304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c19ce67cd21ca2279404602b1aa3c7b937dfc87dccea0235efe0cc52ff17390. 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/PT4KG2303305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee3b0f24921e32409b699a44f8094a4bfd107eaa30bb23d4591afc170ab5c402. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PT4KG2303306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60c336735606bf5ded1c567e2806b2901713bf99ae8953570fa9f9cd97e11320. 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/PT4KG2303307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x673fa6e012e9430cbda3abb728fef2cd8d19fd9ac03c6722ed3a845f618861dc. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PT4KG2303308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x663829560a51ff80fe69bf1744a4333206c960683bb83c01a750af493b60da81. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PT4KG2303310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e94b8eff444275e52b6b75f61021859ca50cc4dbe70e3d82ddcdfdceb1dc7e3. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PT4KG2303311.
Loa. André Dias de Escobar (C.1348-1450/51) "Laude and Spiritual Songs..." (1435), Laudario Di Cortona (13th C.), Laudario Di Firenze (14th C.)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17efac0db817f77998789a6253707d175b1a35127032048cbdafa85ccb4b3fad. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/USCGJ1718628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe4d578a53ce89f77d61cf4dc4e2f5f32e48bda0d75d836c41f9d0c4f8094a11. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGH1470074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8170d37562e9edba53324b153fc3f27c3397a117aeeb6db46cfad12354a8a2b. 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/USCGH1470076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6958c575c65bc862c4035e80026b02a111cfb4f3bea26eda6c63d765ac9e43c9. 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/USCGH1470078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6f71b3b0409f16bb211fad091bf9bdf63eb44bd691185e060b9fb94be3f8aa6. 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/USCGH1470081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdece68b45c9cdcceee7a7152cc2d0ac0acc6bc2dcd02983f415a1bb345d2442f. 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/USCGH1470036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x637ef0eb2867bcae11fea1aa3173953bf9ffe648849365ec94637c3fe55779b4. Chain 2 (Bitcoin): anchored in block 960101 (2026-07-29T11:46:30Z), 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/USCGH1470037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6049e889196457585c44a270b75b30ae10e04f586730de099e170ab7112708bc. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGH1488309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31fd65a8bab70e0a9113480c1054a2a36a87f89f58397dac3bed3f584e7de20f. 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/USCGH1446361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x440d8aded9663fce629bc5cb31f7a02257d4b4805e52cb606a9022ba689b9fb4. 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/USCGH1446362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf82fbf85d430677ace979f588850f125eef8bfe9c5aedbbb4e3c8535216dfa7. 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/USCGH1446363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb36defa92ce9c317bfb3ddecd11b9d395c188237b93a23dc2385903a793be2c7. 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/USCGH1446364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61f4c5d85240e7993613f6cd77c1be7fdfa3ae308fda06f44b6366faebc64c2a. 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/USCGH1446366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66b883d89d405a542e27d0a8340aa82efb8507ddff77647886c20666b754fc45. 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/USCGH1446368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaefea7b6f72bb82902fb61bc4eb98a7d999051c4ab78c62e768f1116f0b1849b. 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/USCGH1446369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb40d85b7e02e407d94007aedfe33fa76a0e8409a01323a2288ecb83a32c9cedb. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGH1446370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf2e01f071dcc343a051b587b392f284ae5ae382d06d63dc5f5931a12725147e. 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/USCGH1446373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51d356ce1eb8c0a6bffd33ba8a4f48e00265ba2492d72d0f8ad967eecabc5619. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/USCGJ1722115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7d8c925f5bbf23f25fd68be26525d804af367ffaeab10eff19126e4ac66cdc0. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USCGJ1722123.