Wagner Domingues Costa (5 November 1968 – 9 September 2018), known professionally as Mr. Catra, was a Brazilian singer and actor. He was known in Brazilian pop culture for his large number of children
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca3bbfd8dfa97681b0c6fc65559ed0cea40a7d91c14ffc54941a15f825023671. 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/9b72b2b7-78e5-46bf-afa6-34fcdd653522.json and https://artists.proofprofile.net/proofs/artist/9b72b2b7-78e5-46bf-afa6-34fcdd653522.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92e5b7dad0f0d74490a02285ec097df2e42249a1b5df07dab11d71cba883bed0. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/BX6841200053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1927bdbfc051a89e940c8f439d2b97651f565017123e17aed32d8c25f0d3a4a5. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/BX6841200018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf72395828d9c98e5e59ff93079ef4cde4f9381f99ce6cf75b1c09f2ddcfd1e2c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/BR8WJ1300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x041cbe4802ac549c713f3146e2ef5ec8cdb5cba97f98f771d703788e243a31b8. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/BX6841200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x048edf33e68d5c39f525ae20bba82bbcd5658ef71baba188c8351ac23c3ced0e. 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/BX6841200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c15ff682001b83687324b9a4981ac70bd19dc66878d5f4ad53fefb9df06e50a. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T17:32:30Z), 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/BX6841200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x898d032c9557bde6b71f4fc6d882a7551d9a10d0e55e775d9706e6396f9c9a78. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/BX6841200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x258639d3f66fddf892dd9d1d10a1cb4b54abe2398130c076f46e42808d7d5c48. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/BX6841200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8952646de52d15bfd207303857c0e3e1f7256ae12be07b864121b2040ee03f36. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/BX6841200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf5243e83c9ca14c0d958cc8edbacf263ba396da6b5aa2a1971e48bc6b94bd44. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/BX6841200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf5243e83c9ca14c0d958cc8edbacf263ba396da6b5aa2a1971e48bc6b94bd44. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:37:55Z), 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/BX6841200014.
Mr. Catra no Estúdio Showlivre (Ao Vivo)
Se Organizar / Ritmo do Pai / Violência Amorosa / Senta Kika - Ao Vivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d56fbee6934a3dd0defa81e58b347b18cf74f27a5297a4386703632599544f3. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/BXSSW1701111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb498c11dbfb74a701075d393a863b6633d12887463a97d23bdbacc8386860ec. 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/BRRGE1709993.
Aquecimento Radiológico: a Pretinha Tá Que Tá
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0a608aafec1e47954f735029ccba1bd006c1a0cf59f636fe91be5947f0045aa. Chain 2 (Bitcoin): anchored in block 957868 (2026-07-13T14:56:55Z), 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/BC3PG2303100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefde1dc034960cd680fd9e36ffb15e6eb72d2fc6c2cab3e13dc3fbb8cae918b2. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/BX6842500014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe70066f1af3b699e7442862af99aef37d24c4f04f57c8eee0f74294d8897f3db. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/BX6842500076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c03f64db457d03bd696ac1dbe3d3341a7445c1d464195f0547644494785f38f. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/BX6842500133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c6463f0da8cb75d1d53bdf4f4b8f49edc7fb0db7bc37b148c6b4a78cbebed21. 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/BR1841200056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d2ba23b2bb65b67c42dc4450b46a00537ce89fb4c35f79b4ecbee0c6491580. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BRVCB0600039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd4d85a55865ae15832d21571b84db7df6c7871a25ec14b4a5509fd619300f1d. 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/BRDEP1400119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8328e62ed2c403446e6dedefd551710d75cbcee982a5878db76dd7bfe82f95b. 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/BRVCB0600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c0addeab1922d15b706693cfb3a17a610392a821cfc93110e2e7a7eab4efa18. 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/USUM71013759.
Baile do Dennis (Ao Vivo) [Deluxe Edition]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87bfb9302f022337daa1d8cabcc8a6e1b3279c887b121afbfc6330e233a18e4b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BRT3O1500048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe5118ceecb13fa35a7aa7e69bd3fabd9d866409da32a9442e9f308d510f332b. 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/BRGPH0600008.
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
Tropa de Elite (feat. Mr. Catra) - Single
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacabb7815b6f8543cd911c33a075dcb3f30c9de37a027c5d2d9e04e4efbc36cb. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/BRDEP1300255.