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 0xf5a032e1035642377da461fb5f1d1aa465fd5e07e297a9607c19b2bb53afe47c. 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/c0853f95-9ce1-4f29-a97f-aaad3836f3d1.json and https://artists.proofprofile.net/proofs/artist/c0853f95-9ce1-4f29-a97f-aaad3836f3d1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Pout-Porri: Velha Guarda - Acadêmicos do Tatuapé
Preto Velho Canta a Saga do Café Num Canto de Fé
Sambas de Enredo: Carnaval SP 2022, Especial, Acesso e Acesso II
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 0x6e1c9bd00a33b33bd2fc89515c632e643978fc3e4ddddab67783a16de9be8828. 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/BRLIE2100004.
Meu Deus, Meu Deus, Está Extinta A Escravidão?
Sambas De Enredo Das Escolas De Samba 2018
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf403650c395a23372f8c8492880289fe226e2e2dddbe0baa04c6eba6f682d727. 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/BRGES1700012.
Bravos guerreiros: Por Deus, pela honra, pela justiça e pelos que precisam de nós
Sambas de Enredo Carnaval de São Paulo 2019
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d5fb2040ea14b9661eee0148c66c39598c00d79ec7d129f807489213a6c70f4. 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/BRLIE1800001.
O ponteio da viola encanta... sou fruto da terra, raiz desse chão... canto Atibaia do meu coração
Sambas de Enredo Carnaval São Paulo 2020
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16a7238f40d30109f968cef434c744c56163eb2e9758fa9f8f1ea16dcee043bd. 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/BRLIE1900007.
G.R.E.S. Acadêmicos do Tatuapé - Bravos Guerreiros: Por Deus, Pela Honra, Pela Justiça e Pelos Que Precisam de Nós - Ao vivo
Carnaval SP 2019 - Sambas de Enredo das Escolas de Samba de São Paulo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d5fb2040ea14b9661eee0148c66c39598c00d79ec7d129f807489213a6c70f4. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/BRLIE1800001.
O Ponteio da Viola Encanta... Sou Fruto da Terra, Raiz Desse Chão...
Sambas de Enredo: Carnaval SP 2020, Especial e Acesso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16a7238f40d30109f968cef434c744c56163eb2e9758fa9f8f1ea16dcee043bd. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BRLIE1900007.
É ela, a Deusa da passarela. Olha a Beija Flor aí gente!
Sambas de Enredo - Acadêmicos do Tatuapé
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2800736f27ecca907f23d9bf4a0c0f3b1f8c6b42e52b3b41e32a6f6c5649432b. 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/BR03D2200948.
Mãe África conta sua história: Do berço sagrado da humanidade ao abençoado menino da terra do Ouro!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e36f9c6db6eb1db388006776333dab75d66c546dd46955ec0886e286b980a43. 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/BRLIE1600002.
Maranhão, os tambores vão ecoar na terra da encantaria
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd72ef69efe77beb64ca6a2b9196d287acb15eae3142998c7ea94d2f0d37f5641. 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/BRLIE1700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d5fb2040ea14b9661eee0148c66c39598c00d79ec7d129f807489213a6c70f4. 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/BRLIE1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16a7238f40d30109f968cef434c744c56163eb2e9758fa9f8f1ea16dcee043bd. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BRLIE1900007.
Preto Velho Conta a Saga do Café num canto de fé
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e1c9bd00a33b33bd2fc89515c632e643978fc3e4ddddab67783a16de9be8828. 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/BRLIE2100004.
Tatuapé canta Paraty! Do caminho do ouro à economia azul. Patrimônio mundial, cultura e biodiversidade. Paraty cidade criativa da gastronomia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f69024a2b113d5c8d6e0f0e0f4f1bdaa41b60389c772c38fd85712c0d0e85ff. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BR03D2200568.
Mata De São João – Uma Joia Da Bahia Símbolo De Preservação! Entre Cantos E Tambores. Viva A Mata De São João!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa9477f5d05d458ff8fbf7231e5467735aacd25e5c2f40e904bd12748725f6e2. 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/BR03D2302406.
Justiça - A Injustiça num lugar qualquer é uma ameaça à justiça em todo lugar
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc56e17819be5c32df0219c463f897d1a7834a03ba07c39740f99e1f977a649aa. 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/BR03D2401924.
Sambas de Enredo Carnaval de São Paulo 2018
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd72ef69efe77beb64ca6a2b9196d287acb15eae3142998c7ea94d2f0d37f5641. 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/BRLIE1700001.