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 0x3334cc07174e37e658cd998a5f5b7bf95241a893137f8ea0d6884c9d2850b32a. 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/8647cfc9-ce08-4c1a-beed-69f47c223ad4.json and https://artists.proofprofile.net/proofs/artist/8647cfc9-ce08-4c1a-beed-69f47c223ad4.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 0x9fbfe88f910bfa552523a75b65925877715838053d4f587c4ed7c70df60a83c3. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32203692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0faafcf83e44dd28cafe8dd42cdd9125d2cb0889919bc4a67eb0ee938d8ea2e0. 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/QZPJ32333970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45d425bd6b866c7cb34a6a132dd0aabb8d4abc4027bd6622229d42a18936844f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZPJ32202879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70ba86428b6bf6c1d97817a26c87a9354ea881a715e06acd10240745331a8557. 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/QZPJ32231318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedb510d6362e375f2bffa9431ba5b6260556e24e1b3aea0598e52473001308da. 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/QZPJ32202882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56ed3084675a01f9ffe6cb2831f03abfbe05c22a7d7ea75ce06971ccaf66c729. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZPJ32231310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x796013e0c36dd97dbad29bd78a4957a47921a424e7fdbcda19d377f5adc3a032. 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/QZPJ32202880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fbfe88f910bfa552523a75b65925877715838053d4f587c4ed7c70df60a83c3. 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/QZPJ32203692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafd652fc93a7d1ec9bb536af75ba3889ece317d680bd8bef2fc4254927dceaee. 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/QZPJ32203690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd053c4895d72a89028a46a2c9dafb3c6b3ec6d7ad81ce6942011d7c6e986099e. 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/QZPJ32203691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd16684ed6c8358c44867bbafad12a8ef795635c53680b1a4887face60e3233f5. 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/QZPJ32203687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0991cb0a3ede032b60e1da94bebc4a7d3c51d18ebbf3d9cb86ae654a88c5234f. 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/QZPJ32231316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73a6473b91c465eb12605870a08cfc54a3049998d26a3685b130436c81a0d402. 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/QZPJ32202881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa51673ba497ba6e293bb2f03240d7f51db7f74307b47385f42a17cd859bbaadb. 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/QZPJ32326166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x328bcf60d691aee54aa931358667afc7f891dd8e721ed0e7acb58ecadbaea0ad. 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/QZPJ32231327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc23dff14e19a301624d7744174eb2cecb48ac1ecb0556fa5fa3d20bdf0758a94. 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/QZPJ32296503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x291667d4e76405a2cc03d8851853d83bf1d99ab351870494f01ca4d405725cc7. 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/QZPJ32296501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6225d7f30bb1344b00dcc6ed6bc6c92c224917dacdd9ea136a566786059b9f29. 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/QZPJ32239841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1795529b588afa5e6b3a7fab4a08433aeb15ac312cc7646ad369fb83299e9e0a. 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/QZPJ32274169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4406cb84e0f7772584884813837d0e6a1b3a73e4b29359832be36e8ed64dae2e. 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/QZPJ32296502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47a207d32ac75ad3d9a366172ba77d02333bf1c4e507e72da790eeceed378672. 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/QZPJ32319254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1335877081c9e0900824a47a687005db1376df1a6c07fc5111af1bd28c7a011f. 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/QZPJ32231320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2cc132baf00e19d4dbc23440a1e24edd146dbb67c585a65360c9db5f883249f. Chain 2 (Bitcoin): anchored in block 957876 (2026-07-13T16:00:32Z), 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/QZPJ32364311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a3af79bd8022ee4361271c8f1c6d4a5b2ee52838d472ecae44de619d5a1bfa4. 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/QZPJ32339603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1df66bacc642eb2f55f14534e2434c98b21465431ba4c995d3f76989ed282dee. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32359938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd9240d8b3e7f4700dcc494e494a81e089506e370f1e868167447976d865f6aa. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUGBT2411493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a366a0fa8a31e628687b71e875fc4753cbda8e3837e042524dc52753af69973. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T08:37:45Z), 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/AUGBT2492785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c16146aaf055d7ffe991e3de56849f85f8d2b775de42a4a212c12ce605913a7. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:39:55Z), 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/AUMEV2542505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9162c539ea96ed9136c5a8cdb3c6aad53af58eafbf2717afac635c429246723a. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:23:38Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUMEV2542498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x580d689f0fbf8b9d3cae3ce037ffe7a88748687ab17ce8b4cbacdd54989c185e. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/AUMEV2591667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc0d6235d8362908cd65766d20857f583085c0e9e0f6876ef5f07b13899b4c2a. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:17:06Z), 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/AUGBT2536586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2972ca0aaf05208cecf12fa4155e00defe7cefffe6143bb961ac2a31a0a10bd4. 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/QZPJ32234504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87f1ed752b8f5ce5982d8e34af9822eb8fdd73ed57c0b7e5d78e465f7bb6a737. 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/QZPJ32234499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa64788c3ef66ed39ddeb56aaec4a984b0a592b6d450b9d9d461b21aa1fc291a. 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/QZPJ32234498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a3917f5980c3335598ca2e315be2e87fefaa29e361e8518402ba382ae3c3e71. 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/QZPJ32322946.