Maurício Mattar (born 3 April 1964) is a Brazilian actor. Biography Maurício Mattar was born in Rio de Janeiro, the son of Jarbas Mattar and Liedir Mattar. He is of Lebanese origin. Mattar is the n
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 0x9b00c6afc4132521d9b1f6b04cff0cf60084fbe0622ba7b9901f7eacb1c54505. 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/d244fbc2-ce8f-4b0a-a508-94afafd2e894.json and https://artists.proofprofile.net/proofs/artist/d244fbc2-ce8f-4b0a-a508-94afafd2e894.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0xd8b92553b47a40ad27627801b71a02a1d0df58f33d59840ff3e85f0e96e492a9. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/BRSME9500257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x614146033e59254c7d9138204487a7fa8899dafc647f6dda7254673a70925a3b. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/BRSME9700245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0dcdf58f98295bf4a581ecde2013e7d384e073610536bc1d7c27b0f23244c82. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T12:42:16Z), 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/BRSME9700247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x691687c165c1b33ffa78a05cb7abf8d67de66a11b4bbbffdf236d70b262c464c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/BRSME9700252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc615246e286694c0a30f4fbd8e4b69d03040be293ef9932f1426d26843384721. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/BRSME9800714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5617e3bf27b43a14561cb9d9478cfe3713fef787dccee277f9a534cbc4ac9b4f. 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/BRSME9600427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5617e3bf27b43a14561cb9d9478cfe3713fef787dccee277f9a534cbc4ac9b4f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BRSME9600427.
Vinteum XXI - 21 Grandes Sucessos - Angélica
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5617e3bf27b43a14561cb9d9478cfe3713fef787dccee277f9a534cbc4ac9b4f. 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/BRSME9600427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5617e3bf27b43a14561cb9d9478cfe3713fef787dccee277f9a534cbc4ac9b4f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BRSME9600427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f0ac5f30ac770a6ea131aaeacb0ce3b2cee8701e6eaff095a94cb752bdfd2a. 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/BRSME9900477.
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
Toquinho e Convidados: Canção Dos Direitos Das Crianças
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebaccd77d6d19dba8d40ee10df15a3c4c68df946bef3a7c51d4d8a7159b7121a. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/BRMVP0401301.