Marçal may refer to: Fernando Marçal (born 1989), a Brazilian footballer Guilhermina Marçal, a Roman Catholic Canossian sister João Marçal (born 1980), a Portuguese futsal player Juçara Marçal (bo
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 0x20e728c07b12496da8e029424a5ae0707e1e4d8664bf805ce9953d9d83c8467e. Chain 2 (Bitcoin): anchored in block 954728 (2026-06-21T18:08:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fbbec9d2-1c01-4aa4-a378-c34bec836c26.json and https://artists.proofprofile.net/proofs/artist/fbbec9d2-1c01-4aa4-a378-c34bec836c26.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 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 0x5fc5b8c3875e58788e3a66d4d775905daef49c0b52bbb569ba1489be86d6d45c. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/BRBMG9010104.
Três Palavras/Perd¦o E Paz/Canto Pra N¦o Você Chorar
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd57fb30ae12ca81ab1dae8cfe98d9ff2cf624b421352115c2f5afe212ddaaa04. 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/BRBMG9009991.
Leviana / O Meu Amor Tem Preço / Contentamento
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51eaf2e7e76a179121ff9dd06e93d912521164737a8a263eeb6be9057b9bedb8. 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/BRBMG9009943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43c43a50f5e2bd7f1a0cbd862b6a5c5e80965b151a27bce2c914fe7f54871444. 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/BRBMG9010193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda80a52ae528c1736fe226480b7b7c9e21bf118d1da1699469b39d068d39e485. 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/BRBMG9010195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c8b47d2078d7a1acde81f0fbb436db99cc55e69b106d5b1cb69ded296088039. 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/BRBMG8901680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62728ad21a88ec537da8084b905b9796242b9567e0c6fabe47eeeb2c794d7d32. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/BRMCA8500111.
Mangueira Não / Saudosa Mangueira / Lá Em Mangueira / Praça Onze
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58c0db6fda3566c6b7389a84038ab4b0cb852da681ad2657b375f9f95f591f89. 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/BRPUI0600082.