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 0x74a3649ee6778a918dcb6d8ed18b3b51efb884ee8311a06bf2d2a50aba5e8568. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/283ef037-fcea-4635-9d61-5d2097f0fab6.json and https://artists.proofprofile.net/proofs/artist/283ef037-fcea-4635-9d61-5d2097f0fab6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Sertanejo Brasil A Música da Nossa Terra
Tributo em Dose Dupla - Martinho da Vila e Paulinho da Viola
Tributo Em Dose Dupla - Fafá de Belém e Roberta Miranda
Tributo Em Dose Dupla - Altemar Dutra e Nelson Gonçalves
Tributo Em Dose Dupla - Jorge Aragão e Zeca Pagodinho
Tributo Em Dose Dupla - Fagner e Zé Ramalho
Tributo Em Dose Dupla - Amado Batista e Wando
Tributo em Dose Dupla - Fábio Jr. e José Augusto (Cover)
Tributo em Dose Dupla - Alcione e Beth Carvalho
Tributo Em Dose Dupla - Alceu Valença e Geraldo Azevedo
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 0xd19c15ed7ba1cadd93dee40285364b122744d218b95bf8bb7e06f328847a1c67. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/BR03D2302879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1925b933dcab34c6724a68d8b939e053ef0990f4cb29366490e9d810289b7096. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/BR03D2302880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4626ba87289de4804a606157e0f17310896e4550251a78a9a92398ea7144259d. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/BR03D2302881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6c1204d078e6a8f54c9e31eae33ce1dca8fbd5790435864f8a6d27c6c918680. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/BR03D2302882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa36f875c1adc9f02701117948419bbd8ab92e87ae4a6d428c962a29cbd828ea1. 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/BR03D2302883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe09d7664480e0104eb14a11f93bfa7e96f8fc95bb7d6bd94fc085ba45dc7a89b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/BR03D2302884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x336e0f046bba7720db66d3e4fd8fde74c54d63ace6b0460ce51f6bb84e419a5e. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/BR03D2302885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1a850862be05df626f050a90d8622d7fd9074161c41c90f36683b745aaeb1b4. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/BR03D2302886.
Ultra Sucessos - Brega Com Amor, Gosto Popular
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Música Popular Brasileira – Toque Feminino (Ao Vivo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69990ef391e8fa35595ab9cb3c518400d6d4d58fd2e11847b81530e916d2b52a. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/BR03D2400249.