Fernanda Abreu (born September 8, 1961) is a Brazilian singer. Biography Fernanda was born and raised in a middle-class family of the South Zone of Rio de Janeiro. Her first notable public appearance
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 0xcd0b97065cfbe2da5a97b596f76e32a2d069e1b20e9837ef4209b464b63304d4. 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/01fdce91-4626-4cd4-a08a-b29437b3e941.json and https://artists.proofprofile.net/proofs/artist/01fdce91-4626-4cd4-a08a-b29437b3e941.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 0xe9f08c0276d57e936c4af44ba366950f0c8892a4ac3959e80a6093e5c64ae78a. 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/BRUKM1500110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f104c82936b8784a08dab123f77b8879c4f851c0deefb183a56404e09017add. 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/BRGR92100025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84848bc1bebcf4e2373b3e7b0fa0e03fa4db0d4704495646a1b446594ccbe461. 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/BRSME2004271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf37f8b9877a0e0482bdbcfdc2e0fee306d7e30ed3dd988a2c118f72fd747e09e. 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/BRSME0800192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb543b4c0547dc913070321c63bbce83593417afceaa56c2e7aba689494dd27. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/BRNIK9900007.
Jack Soul Brasileiro / Incidentais: Cantiga Do Sapo / Chiclete Com Banana - Medley
Welcome To COPACABANA - The Brazilian Melting Pop
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x076acbf3fa606b15e81fe599e27e67c90da70c151090ed3d0e7ececcc06ce76a. 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/BREMI9700245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4611dc7d8c9d7285b3324ade03c411134cd87c12df7712391e7771d04d88fcbb. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/BXSVC2300076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8354f8f8256f5ecfcba50f296b493356d063e66b45e5b69a5bb83585d5006790. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BRZ9C1700021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10844e17790f4e6b5b1cd0d7ca6b70e8db330b0b97be6b003277cc140ab89fa3. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/BRUKM1300025.
Um Barzinho, Um Violão - Novelas Anos 80 - Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x491899a053e74e111fe9c478993014c149c466756bcb586c0104ce3ebaf4261d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BRUM71300860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18a35b25beb06fbaf493cfeabee867be2343be56cb9d4baa131a8691602b1a67. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BR3442200014.
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 0x9efd8fce1650951e8174297328e281b7cfd0483e63a9551e5479189b34135394. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/BXK3G2100007.
Uma Noite e 1/2 - Ao Vivo no Coala Festival 2023
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bcb8bd5cf0e24d5ce57a85c3401c86609ced771c3b200bdf6fe38239f4791a3. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BCNMM2400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8959d8fbc8a16520f52e7f5ccba90ea42c7e33713eaeb55c0bc7ce9d21a7682. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/BREMI9500354.