509-E was a Brazilian rap group formed by Dexter and Afro-X when they were incarcerated in Carandiru Penitentiary. The group dissolved in 2003, and they both launched solo careers. Career Dexter and
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 0xbc348fb745868c0463f1a9d40b91f3e6c0295e8e006f0d533cd9ba34f214cfe9. 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/f2d64322-412a-43e2-a556-08e13e4d9133.json and https://artists.proofprofile.net/proofs/artist/f2d64322-412a-43e2-a556-08e13e4d9133.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 0xaa2561d6dbf14f8d914150c1337d224dcdb9d185386d9383b4c5eb5fc2171908. 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/BRCZ82200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc128dd5e46a34ee14425b05ead75456e5e960b2b8a5da7cb101ab0fcd721a23c. 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/BRAPI0000219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38efe769a02c58c9416554a015077343837cab4aaa0d6e2779d254b4f65a0cbd. 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/BRAPI0000216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35fed4780f32ace96d1dc6c5b902b5f4b2eb8d1e3e0ef44a92c154fb8f5f824c. 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/BRAPI0000213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e253389aca966153f47e83eaa3da816d2d37b3867c9fdcc6dbd3481f14646e1. 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/BRAPI0000206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b661f28017745b42ba9ebb02e08eb4ec79cfdf1aa7f08d9e09988e7437853aa. 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/BRAPI0000210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b27a2d8d2e99a7e55c55b71c57947fe7dff3d281ac5f0315b9a25576b5c80bc. 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/BRAPI0000211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x979c56d97cef1f4e92de7588b8c75db0d9923d53cb97cb8eb6f91afa8cc62b9d. 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/BRAPI0000207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07ab544bd75dd5c35fdb89068f3ab51aa7104f5c06a3169f3debd1ebf920c14b. 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/BRAPI0000208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb9bd2370bb4cc8ec02de31a166b9c26e416e230c07a8e91514479fd68f284dc. 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/BRAPI0000212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x463dfef27c86d9e6739e63fd02e26a2f3c97fdc11823ba10568407838e943697. 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/BRAPI0000217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd78c32317252570879fb3fc8c46b0338f1b1faaaedc22c81bdda2aff7296fe4. 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/BRAPI0000214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3348bb9764eb3127ebd121f5d69cd2ab0dae4bf227f6e0036646fb8124a4b467. 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/BRAPI0000215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e4b9ace9bb49b59bcf59edfeeb721992b348996b188683ec32005707d14f0b. 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/BRAPI0201149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5eaf8fa124b598594c96c453cb41e88b5f07251cf1db42eb62f56aea5666cc6. 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/BRAPI0201150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd36b060526c23dfd23290348f5d39936a88a37edf71c28c0c7157fdfa615e0db. 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/BRAPI0201151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80562feeed565abbe275859ac221d5dfe7297cea0e41f8c85b7fd3f9e6885d8e. 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/BRAPI0201152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c398297329de4e9cd7d4be24aae7428f247ed8e1b1453cf343e47e7e09c3708. 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/BRAPI0201153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36b0e181f994dc95ecae6a927044b45a56267fab04c28bc2d5313cb472006784. 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/BRAPI0201154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9967230f8838b66f0d55148063bee69e048684c7934306780816e9d9781f3055. 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/BRAPI0201155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c29ce198d8d144ad24c8587c7e0b4ec37dafb808b39b0d8ab3411931fdc7313. 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/BRAPI0201156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31f31bb8e9bd0347988fbcb3a11ea9747ddc5fd1bf153b881e878251b050c14b. 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/BRAPI0201157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d299c92f18a629adfb2ad46571a37165d97041334f57ca50555a76afc98a76e. 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/BRAPI0201158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe12acfa65151ac7d110cbb3d390b3c849c82aa65ace13445aeec55304007dbf9. 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/BRAPI0201159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcabf3294fe0f1dc7f97c36453d2f51032e73dcb23519cc6cd11b22327492d1ea. 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/BRAPI0201160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39ad58d741dcb2e1c7ae870275f97fce0211ab5971711303bcc7147e9631fa74. 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/BRAPI0201161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa961d4fda2c391e44aa9196904b9279c799803c8effba4f25b1519c5668511b2. 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/BRAPI0201162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc240227605f8687466c7ab489abce75b0587dce8d2b9e5932dfe154ba1cca93e. 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/BRAPI0201183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d06f30a94295676b7d6dc26793e397d7ab4ef4522ff0e14c2aea71edc1c72f3. 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/BRCZ82200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b95b8be07b5138cc464c456c1e8425a013f2cc99a0051a42ff5c374ada54c83. 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/BRCZ82100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe45f4ee329e964b336bbb852867332465cf19f62b2c0e9a4db61a9fd4256ceb4. 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/BRCZ82100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a3be841d1a246cb9ee40deb99b5c0a00c64ab64d25ee5ff68b5447465826e33. 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/BRCZ82100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2297e1a4e0d5667a3265f2d88ee5fa826a0a1bbfd67563eb2d565101708e6ca8. 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/BRCZ82100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f6f636da61a538e1248ca1e38e25157f9f3da931420e2d1f4a7bb829e0d1dd0. 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/BXIV82242673.