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 0x4c709e04d11cb139b900d8e620081ff72df0e1f0df5d625a2fda2ad213926b8a. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9585f2fd-5d93-4eca-9143-58debd204286.json and https://artists.proofprofile.net/proofs/artist/9585f2fd-5d93-4eca-9143-58debd204286.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 0x742a16d7a07480a8dcd26d596d3d9f063ccaa597defef0cd8e988b96521aff90. 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/QZMEN2392184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64de9aa270ccddbf9383ff5ec25a0de5cce23a44a65b3b65d492c17027353700. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZMEN2392186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabf7ef79f8e07abdd3484426d46ab1c160b728bc1da7deaf3103a94517613217. 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/QZMEN2392187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x609c6a97e736181b2d1714f86c6df66033b8151db9d05fecbb1aebb3ba5cb5e3. 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/QZMEN2392188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee0fc3c12d954328562e1dd30b61c23ac659f8d2c28bf2abe1054669af7db2f0. Chain 2 (Bitcoin): anchored in block 960384 (2026-07-31T09:54:03Z), 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/QZMEN2392189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadab4de57ea6bf5a9cca161d773054118ce9fdc351dd75702fbdd53f766cbeef. 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/QZMEN2392190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b3d6bd0cbba3be86ffb3ec1494d0b5cedf9ae54798d15cf9cff7c655d71fa8. 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/QZMEN2392193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d4d24d707dbc233690a4211132e8be4b6b5147ddc078a8be79466701f81978. 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/QZMEN2392195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f5bbd69792b88f226e5d813bb1c0d68ca7d4048cc5cba1afae34fd929b1e72. 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/QZMEN2392199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b7b13d06956ff47ad4a6a24fb608ab49bdaf3bdf91838c2cf5b9de0705cb11a. 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/QZES52174041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fd38d0236a4682c0d01c320345bf94f3ef7206eb525d57df413d0f9d440b74a. 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/QZES52174042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06245d1e7c66d67c82f5273178bdc1691cfe2aa1784dbcfc025b37d010c52d1a. 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/QZES52174043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00fb7aec9a04d71fa594475bbd254796d9a66a6cb3c8994ea41d967488f04dd8. 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/QZES52174044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x543ce8242c5d25d5fff986935ccd5701fea15ee2cdba437f9cf78f58f1c761ac. 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/QZES52174045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc70917356960a87b17e6448e0f15e0f1f116a891201e8047c8c31d392c24d136. 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/QZMEN2177890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x957054b5e6608f1b28e637f2b92cd5e2748d01f8d5cd8b375f82661789a28f82. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZMEN2177891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88e93a7ff0f6bd21c5e38c35505953928eb9472946d73a55cc916b997221f952. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZMEN2177892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cd34533b5e25fa9e2138543a7bf2d1c7de11a0e6581624ff30c4357a207e0cd. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZMEN2177893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x813487bc8a6c286c854dcf9fa9130b0e7d87c9533fbdfc62ccb03efa1bb6a957. 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/QZMEN2177894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa572049c3cf8e66d9624cdaf4922c7f82f7ca84592e1810663abb5370109baed. 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/QZMEN2177895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5903d72ac3bdb7d5b66913b663b43c546fcba37253a13c28494b0a799cc170f. 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/QZMEP2102735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb09582aeb27546f66693e5795296fccaac408f266615982fe86c3713cfa031bf. 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/QZMEQ2169522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe555113b518d44e5ec39796008581cb1ab17674c289adccfeda59a26eee96ac. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZMEQ2169524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec58d8d2ff13e249a9f9d7de4ce57329212f55af2f02a18d13618d289a0461f6. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZMEQ2169525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x666e01762e327469dba4fdfd28f9fa1eb6b5787c66fe0843ea1c0994b1e620c0. 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/QZMEQ2169526.
Pretória (Uma Carta para o meu Futuro Amor)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07a787faaec2399c0a377607e5183727b4a8f7cd50fc094ca51d7f289a3a9eca. 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/QZK6M2151786.
40 Dias (mais uma história que não deu certo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dac07c70a7bf814705feed6c8a13985585c40e13edd6af97a1059e92a1085c1. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/QZMEQ2167053.