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 0xc99f1825f299ea26b136aa43df0fb442ac5931c5da7b060b7a36e517fa306a7d. 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/de231245-a4e1-4cbc-b7c5-ec8be42fd09c.json and https://artists.proofprofile.net/proofs/artist/de231245-a4e1-4cbc-b7c5-ec8be42fd09c.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 0x4f5aabfd71c963b08ebe696f59e485fe71e9f97b6acb92bb3e815e2f36706298. 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/QM6N22328534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41286aa691f8dc3689de1899a3899147eeb36e5e4c9c817b8b04681f24a765ef. 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/BK4DA2315173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee211b8bb4f1f28a5e3b7bebc938db24a98d1703b889e52237cbcc64b5d8ec68. 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/BK4DA2413887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3943c441aac53d8f077ed6d79395331a2520e979da79191a0c1312051255fb4. 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/QM4TX2446646.
Japoni (Feat. Camin, Moncho Chavea, Jthyago & Samueliyo Baby)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41a5a925a811398bd40ef19b8101b02f5381856f521b57b6c1c517115ea5c94a. 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/BK4DA2326219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fc0c4b968bce62e7795f6512f1cb3c2557af6373e30c1322e34e337cff46b49. 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/BK4DA2326217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21a3b923366e1153492eaadafa2eb70a8e4439dd76ba80abc1646eb1732251b0. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/QMFME2356663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00634e5011cbc6d6fee6671206f29e72aeee47154a7988be19513c4667b31806. 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/BK4DA2314287.
Siri (feat. Jthyago, Anthony, Jhaylar, La Cuestion, Siskuflow & Brahms)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d92e75cc013c5f5093e8ba97c563a6b1b649c8aa49065ba4c1bffd5fe2927bf. 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/BK4DA2313470.
Las redes (feat. Jthyago, Oscar el Ruso)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe70328e2a4253869bffd988bd3f7b0046b147a3418c1892f12b7b7be5eb0abe1. 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/BK4DA2306992.
Rompe y Pixea (Feat. Iam Carla, Son Cubano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7c4f72709e1dcb2711ee20cf256c4a15e2aa5a94ce89e7651b58dd96a6459b1. 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/BK4DA2306712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7976c65c33b23fe6053de4933e370930f5190b5381c571c72dc5eeff61653ced. 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/BK4DA2301678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62e01cbc229c480370ff82f05a698ff74924308f845c9ddc644edb4a951158d8. 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/ESA092235924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba3087d0e21ca2c62acb55f6689221dded962277637b95059e3db3167bf1d5f2. 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/ESA092202666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c8c160a71013bb27a34311c9ff9048866b75295cc73fa691e81eaecca784514. 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/ESA012252692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd813eb30824a0bbfbfd5cb1d0997213a12d704a3be2ff3a17f0f2610f48ecfca. 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/ESA012212268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eb7afcc65e9b0dec4933ef1005ac0ca44c93968de68966e6f4ed53b888eeac3. 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/QMDA72130192.
Mari Mari (feat. Crazy Rich, Sami Duque)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb87bad97be901cfa19bd855f453926eb1fe500cb2a7a75ee100ebd41cbe7aa71. 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/BK4DA2416524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28d58a57d52e09feb34973b58c53db5761db8ab89730c1babc2a2a380cdab9de. 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/ESUM72402028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00376be1ab9633d4ca90512f2e69840ff9781f1c2cbc26c047e756c6baf50599. 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/BK4DA2417357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2edee945ed4d40479ece80deb09f7048ccc09e1d361057a672604de020bf4d39. 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/BK4DA2452703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcef938f6c694428ed2ca9f998e889eaa99205042e76166aa2548c729a6d3368a. 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/ES71G2420453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef1680ccc3c44fa00778b057ed9418d03f16dfc3ddfd2faebd0c943833866a35. 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/QM6MZ2503350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf0ee2a54aba4d9da90b51251867dc3741d6b5acf2e029272036a486c0a264f5. 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/QZGLM2503819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7db30d66cb50f0889b8033a38c7512d3ccd70ec63085d47ac3fe473e31376bae. 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/BK4DA2502263.
Maniatika (feat. Samueliyo Baby & Fabbio)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cdd5c65abe44e30f40cda76f3d780030de6d3a032ee20dc8a387753cd2e9da7. 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/BK4DA2451745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dc01a6662848595132d8a4fd1dfe625aa1c74615aec911c07b35ecf4e4ef9cd. 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/QZTVM2449164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2eb19a9240635d3d1000a95137df02db43c75493b837d39eee34bd6432f7b30. 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/QZNJY2453264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe94d67c63d74940b57c66e74c85937536c9b40904d6bd1fe9a39c16d75e26e5c. 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/QMDA62100112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a12692df43191b368390044bda2376f7c6aea684074a98834eced00898d8479. 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/ESUM72401985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd955ad2109c8500e14a8616bf2d4e926fad6146da9ea150dc50a7891357e193a. 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/ES64E2416704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e8b8cc24d84c88e1bb47291ca926d4f9568ce57d5c04944d3350984565bf6ea. 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/USA2P2457298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b99fce272506a53d6dcdc8da8196f7da924f502744c85f3a71e7a701ae2cb25. 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/BK4DA2513955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x578e44da564847b6bc47f0aff2a37354180a96ec8489b418dd6798144a4fc5b6. 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/BK4DA2500537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x954cdcb7a2e7a9bf45980a1fd55c3cd3020da67ed7fe3e9e9184183737fa7444. 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/QZGLS2586495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad9389e052392f7a345405ee1b3fa31962e12a2daaee18fa3515fa672cf10c2d. 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/QZMZ92511141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eb7afcc65e9b0dec4933ef1005ac0ca44c93968de68966e6f4ed53b888eeac3. 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/QMDA72130192.