Grêmio Recreativo Escola de Samba Estação Primeira de Mangueira, or simply Mangueira, is a samba school in Rio de Janeiro, Brazil. The school was founded on April 28, 1928, by Carlos Cachaça, Cartola,
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 0x94da79afc19634a25a79779afe3b416032b637cd5cc994410aa03f24fb88f756. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cb1ab7e0-5b2d-487a-b402-c117ec7cf75e.json and https://artists.proofprofile.net/proofs/artist/cb1ab7e0-5b2d-487a-b402-c117ec7cf75e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Escola de Samba Estação Primeira de Mangueira
10 Anos de Samba Enredo - G. R. E. S. Estação Primeira de Mangueira
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 0x896bb3626675656db365a727c1cb7078ddb885cf3cac7899cb4d3285a89a2054. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/BKNKT2303716.
Os Sambas Da Estação Primeira De Mangueira
Das Águas Do Velho Chico, Nasce Um Rio De Esperança
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb98327f5cf50ea5b81ae455bf10f6ce5b5b2921a33d463a8e9b134001be94894. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/BRGES0500006.
Mangueira Redescobre A Estrada Real... E Deste Eldorado Faz Seu Carnaval
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1fa1b113652ad98db53cefe7291d85a0ffc96a3b65e97384acee8c23e06bf59. 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/BRGES0300016.
Os Dez Mandamentos: O Samba Da Paz Canta A Saga Da Liberdade
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98ed85f0ac2ea3bd1ac5bb5a02b67400ed13299c56e0e66b761e49409b1b7023. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/BRGES0200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24f0d31289b9850897cca6615679592854c3d365787a8d7f285253a05bc6776f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/BRGES0000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb42dc1dd9921f2e2e49e0cfefcda1e087f460d301e4fc11da1e8beb14467d6b4. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/BRGES9800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe36fd83a85c2c90dfa17bec3fa86f256cdfbd09bf2a8e05a03d3eff88999c409. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/BRGES9600006.
Os Tambores Da Mangueira Na Terra Da Encantaria
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf22bf2d7138f6d453a48fc216e36dc31fbaa4c7277c23a2d77b3fef286c52756. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/BRGES9500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03a62cf530a01642686253ac5e1729ce0a9ae290347d796d9bbaac514d678843. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/BRGES8600002.
A Festança Brasileira Cai No Samba Da Mangueira
Sambas de Enredo das Escolas de Samba do Grupo 1 (1973)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c1561c814833b9d2dc074db91898a8910f5b956724df18b78e72408695509db. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/QMBZ91571098.
Sambas De Enredo Das Escolas De Samba 2017
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35f211ccd425abe33bd95feda6915026fade17376fc87d0bc2037526abb83094. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BRGES1600001.
Sambas De Enredo Das Escolas De Samba 2018
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae2be1abf5592ceb54f667331f7cf08bc9b69e47590a375096fda02084c661c7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BRGES1700004.
Sambas-de-Enredo das Escolas de Samba do Grupo 1 - Carnaval 1975
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb1873d55e0bf8023ac4238d3e6322fa46480407584aa3dc799415ca57410b2c. 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/QMBZ91571397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53039bb7e4ae28b4fef38514b1d9e5cce7291152c9f7b37b12af1d174256b6ef. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BRGES2200008.
Brazil Com Z É Pra Cabra Da Peste, Brasil Com S É A Nação Do Nordeste
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f0449b60f47f7d2d43ed250f8d772bb1abe744055547b55e446ba415c1afa8c. 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/BRGES0100003.
Mangueira É Música Do Brasil / Inclusão: Bem Simples
Sambas De Enredo Das Escolas De Samba - Carnaval 2010
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc27843f4bbdfd78d5e2989df5e761f1efa372e7090db5edace2a9ef313dbcc80. 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/BRGES0900006.
Welcome To The Sambadrome - The Samba Schools Parade
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f0449b60f47f7d2d43ed250f8d772bb1abe744055547b55e446ba415c1afa8c. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/BRGES0100003.
Caymmi Mostra Ao Mundo O Que A Bahia E A Mangueira Têm
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39f43502ad91517ef5d5ffa2f278be345115aa5c936bd415a780efdbde3aa3f6. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BRGES8500005.