Sobrinho is a surname. Notable people with the surname include: Adi Sobrinho (Born 1985), a Brazilian footballer. Álvaro de Oliveira Madaleno Sobrinho (Born 1962), a Portuguese businessman and Founde
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x658f3dd765373ef9b0c90eae2ee72256d1b90aa4a018a82824596db4b0aed44d. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6b0b5ab0-9e90-452f-af3b-e64e28ba6682.json and https://artists.proofprofile.net/proofs/artist/6b0b5ab0-9e90-452f-af3b-e64e28ba6682.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Sambas de Enredo Das Escolas De Samba Do Grupo 1A - Carnaval 82
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1309f3ac8c6cbb54fdc2cbcadc8e0c85992eadb174cf4b490158d1ceb9b8182b. 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/BRTTP2100616.
Sambas de Enredo das Escolas de Samba do Grupo 1A, Carnaval 85
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x857ab18b31fd90d43b2d6f4e3569042c3a6aba66131279417421c003d27e588d. 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/BRTTP2100655.
Salamaleikum, a Epopéia dos Insubmissos Malês
Sambas de Enredo Das Escolas De Samba Do Grupo 1A - Carnaval 84
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93fcd5474e3bf4a6f149f45bd479d882a369f79610bc84629a147f7868660df2. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/BRTTP2100649.
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
Sambas de Enredo das Escolas de Samba do Grupo 1A, Carnaval 81
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e95e1815afab72b012d2556bb50363171f12ac439e39fc71007dea4f115b7c3. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/BRTTP2100614.
Sambas de Enredo das Escolas de Samba do Grupo 1, Carnaval 1976
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83bb702bb3c8930c59b4f0eba502ea6be27e0ce1ef02429cbc1e4bdcccda0b93. 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/BRTTP2100554.