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 0x6a710f3268e0289a1bfd154e6367647c579230b1870f32d90bab3b71cf150d2b. 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/937cf9dc-15ac-405e-86e9-5453af4728df.json and https://artists.proofprofile.net/proofs/artist/937cf9dc-15ac-405e-86e9-5453af4728df.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
10 Anos de Samba Enredo - G. R. E. S. Imperatriz Leopoldinense
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 0x89f0ddbffbf0b08cf4627e1c517b12140e2c5bc2bb613b417c1a670a37efd9bd. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRGES0400005 — a six-check JSON result.
Nem Todo O Pirata Tem A Perna De Pau, O Olho De Vidro E A Cara De Mau
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b5918b84558cf67e74f137ec24ffaec98f4a7dbe1309e101974cdba1f11c7c2. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRGES0200003 — a six-check JSON result.
Goytacazes... Tupy Or Not Tupy, In A South American Way
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a3cd8d4c3031893660cb460d64426b011aab5f059bc366484a1d9993848d404. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRGES0100001 — a six-check JSON result.
Cana-Caiana, Cana-Roxa, Cana Fita, Cana Preta, Amarela, Pernambuco... Quero Vê Descer Suco, Na Pancada Do Ganzá
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf72cee74ac2276ecd64c31a91f26b9299fd82768beca52d961764b88bdccd404. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRGES0000005 — a six-check JSON result.
Quem Descobriu O Brasil, Foi Seu Cabral, No Dia 22 De Abril, Dois Meses Depois Do Carnaval
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56b4c869b36cb5e6ebc6637526893c66b7a18c7f514f091cdbe8b65e0c52e1d1. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRGES9900007 — a six-check JSON result.
Brasil, Mostra A Sua Cara Em... "Theatrum Rerum Naturalium Brasiliae"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb719828557c6455f4d4aadf1b378a92a6fe274e808a28893692c88b68b658e93. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRGES9800005 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf3dac52a4615dd3c7199d6dcdb1c1133f38dfa6144f08ff733058ee5d633778. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRGES9700011 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x831fd8358d1c64c1dad6f3c0fe80471f162abbd4640e18a4738def6b64ef2625. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRGES9600007 — a six-check JSON result.
Imperatriz Leopoldinense Honrosamente Apresenta "Leopoldina Imperatriz Do Brasil"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e94541c26ade2563a15eda8bee8ed4b5e08e090049c634245a18f83e3eacd02. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRGES9500008 — a six-check JSON result.
Mais Vale Um Jegue Que Me Carregue, Que Um Camelo Que Me Derrube... Lá No Ceará
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13630ce9148a0628433950abd61472b7b263ad5ad3a8e1b442e1d44bb3a7760e. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRGES9400011 — a six-check JSON result.
Catarina De Medicis Na Corte Dos Tupinambôs e Tabajares
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb23d83a8aaef6d1e2b989a490f7b958198161ef137b65fe12ca51491e9fe9883. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRGES9300003 — a six-check JSON result.
Marquês Que É Marquês, Do Saçarico É Freguês
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b52c86d6f7f3eb9f1ae6b9e85269192d9d0da0abc28a2094f557456875fc635. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRGES9200006 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd286ae8330261419585502faa1c23e88696c98e3ca01f3cd336e04cd0ff4a930. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRGES9100008 — a six-check JSON result.
Liberdade! Liberdade! Abre As Asas Sobre Nós
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25f9593d9fb33076644819562ae6e98fdab8e8f19421ee97bd40c4fa8846324e. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRGES8800008 — a six-check JSON result.
Arthur X - O Reino Do Galinho De Ouro Na Corte Da Imperatriz
Sambas De Enredo Das Escolas De Samba 2017
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc50f06c7fb03922f2571d47a0364e423de19b1056d5a59155155fe950bf99dba. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRGES1600006 — a six-check JSON result.
Sambas De Enredo Das Escolas De Samba 2018
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc62eab8a8e91753661aa5079c7f551bc04b7aab89e01282c9cfbf72bf7a97525. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRGES1700007 — a six-check JSON result.
Sambas-de-Enredo das Escolas de Samba do Grupo 1 - Carnaval 1975
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf982d8c0a794a8883848939d092b3e5e5f6deedcd97ef7e2aad9e79168da9453. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMBZ91571399 — a six-check JSON result.
O Aperreio do Cabra Que o Excomungado Tratou Com Má-Querença e o Santíssimo Não Deu Guarida
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fad4f576e33e445256b0a55004dc0e92454be7e3824d3e3d499d7d1bb272def. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRGES2200007 — a six-check JSON result.
Sambas De Enredo Das Escolas De Samba - Carnaval 2010
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd84f993b466886e9525bc6a91515241e675d1957af0b2395a94ec9355d582c4. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRGES0900007 — a six-check JSON result.
Sambas de Enredo Carnaval 2020 - Série A
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fdb10fc7799b766755edf83b09f41c94a316e6a813ebf07521765d055ca940b. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRRGE1911290 — a six-check JSON result.