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 0xdadc04b16ffe9b62987aafa853e6e8ffba25888dca76a5f37a60dcb6291cbe91. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cbd73493-e478-4941-bf68-156893ce37ce.json and https://artists.proofprofile.net/proofs/artist/cbd73493-e478-4941-bf68-156893ce37ce.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
O Mergulho nos Rios Sagrados em Busca da Cura, do Corpo e da Alma
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 0x3771fca0dbf05da5fdef46fd161cb05184c6085ad14f0729f3e2983a231e90a2. 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/BRLIE2100016.
Da Majestosa África, Tu és negra mulher guerreira a verdadeira
Sambas de Enredo Carnaval de São Paulo 2019
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf682b9b497964fe8cc87f050f10cc4ef9c774d6b97e4aef54824d1cc8a4b4769. Chain 2 (Bitcoin): anchored in block 960231 (2026-07-30T08:33:28Z), 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/BRLIE1800019.
Bartali Tcherain – A Estrela Cigana, brilha na Pérola Negra
Sambas de Enredo Carnaval São Paulo 2020
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ad96824a3026839f089928b6518526c5e2c11b1a579f8fc6f662d57b698e55f. 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/BRLIE1900013.
G.R.S.C.E.S. Pérola Negra - da Majestosa África, Tu És Negra Mulher Guerreira a Verdadeira Pérola Negra - Ao vivo
Carnaval SP 2019 - Sambas de Enredo das Escolas de Samba de São Paulo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf682b9b497964fe8cc87f050f10cc4ef9c774d6b97e4aef54824d1cc8a4b4769. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/BRLIE1800019.
Bartali Tcherain / A Estrela Cigana, Brilha na Pérola Negra
Sambas de Enredo: Carnaval SP 2020, Especial e Acesso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ad96824a3026839f089928b6518526c5e2c11b1a579f8fc6f662d57b698e55f. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/BRLIE1900013.
Numa viagem arretada por terras nordestinas, a joia rara do samba embarca rumo ao maior São João do Mundo: Campina Grande
Sambas de Enredo Carnaval de São Paulo 2018
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cf9515fc896c5c24dc6a825a029e0971de1acf21187799c36557f675fe93a9a. 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/BRLIE1700020.