Joaquim Alberto da Silva (4 March 1974 – 15 April 2019), known as Quinzinho, was an Angolan professional footballer who played as a striker. He spent the vast majority of his career in Portugal and C
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 0x62448126f57b5d9bcdba89d3a719956121d23b09b0bf413eefa3aab2fdc03879. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/65a54b9d-4fa5-42bb-865d-7681cb3a99d8.json and https://artists.proofprofile.net/proofs/artist/65a54b9d-4fa5-42bb-865d-7681cb3a99d8.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Sambas de Enredo Das Escolas De Samba Do Grupo 1A - Carnaval 84
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 0x57132c93280574c585850551e0ba832ac71107a5fc1dadc13365f2c1420e4e5d. 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/BRTTP2100643 — a six-check JSON result.
Sambas de Enredo Das Escolas De Samba Do Grupo 1A - Carnaval 82
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3a105b914e19d3beadb894fea31c701f24dd2f6d279f8a814c3837da2151e28. 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/BRTTP9700001 — a six-check JSON result.
"Bravíssimo" - Dercy Gonçalves, O Retrato De Um Povo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dc347dbcc91838af3d829d601ac2e65b629293413ac49d0fdae339fecbdb8a1. 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/BRGES9000008 — a six-check JSON result.
Samba, Suor e Cerveja, Combustível da Ilusão
Sambas de Enredo das Escolas de Samba do Grupo 1A, Carnaval 85
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79d4c6817003205ddd9f51ac1175b282b7dba39c367f271b3f07ac149541761d. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/BRTTP2100659 — a six-check JSON result.