Trio Esperança is a Brazilian vocal trio, formed in the city of Rio de Janeiro in 1958, by the siblings Mário, Regina and Evinha Correia José Maria. They had several hits in Brazil, such as "Festa do
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 0x40b63c716f332888b8cc320189efde6b5aa6d7b0c81d8043611ebe25bec7881f. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/63243e21-ce0c-498c-8997-17691dbd6918.json and https://artists.proofprofile.net/proofs/artist/63243e21-ce0c-498c-8997-17691dbd6918.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 0x21d76bffb57174df01a8df75bbb57a18dfd5cccfa174b28d67e60787491967db. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/BREMI6500026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfbb1fa40769a67ff5a78dd0cd8967191ca3e86c2091a853f7bd62124fe99fdf. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/BREMI6700027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x975461885b4bae7f85b297936d3c26f9a497dfac7804660ffacfca1cfa91a6ef. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/BREMI6700028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21d76bffb57174df01a8df75bbb57a18dfd5cccfa174b28d67e60787491967db. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/BREMI6500026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd06245fc797428a5e7e30331022db22f3e73a8243530e0b880e29688d298f23d. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/BREMI7500044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6639a4eccf536a21914f7379f1f1afc0c473d1184f59c833b369140fb35ceffd. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/BREMI6500027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x681b728647c553cb7c0a6cdf7a1ed1258198d8b98b00e64ba389e3c103adbc02. 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/FRZ039402270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe293db6f6923c52f7b37828dc8666835809c7019a5889d1743706ee84e9be99d. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/BREMI6500013.
Olhando Para O Céu (Sukiyaki) - 1998 Remaster
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99a2fb3984b48f5b33c5ee33b0b11c42abd969cdb16c1119735b4ff13edc77b3. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/BREMI6300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3d83e468fcfe8f328c72525559bedea4fc1135db1b6efbdcd6d6c063cd8e81c. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/BREMI6300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3d83e468fcfe8f328c72525559bedea4fc1135db1b6efbdcd6d6c063cd8e81c. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T23:11:29Z), 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/BREMI6300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x122edc6ade3435b54a9488b373ef5da207fcaaa02f142fd229c4214bee5c21bd. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:07:57Z), 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/FR9W11214497.
O Que Será (feat. Trio Esperança) - Live "Si Ce Soir"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3427a86f9589c4153b25bd7c7083f78ac55fd33d49d68fa67fc92d24d405dd4. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FRZ059100800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22ab633c85a9ffe79327e029e3620c3bd342fcf1747bb5373bd2a1eabc09c396. 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/BRPGD9500677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0a0775ae9b505d5de284948dae8f4cc7c79718a81c58c37bef95c096f68f704. 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/QM6P42220339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbad074d724adee4f0a73c7a94c9a379d9aca59b8af7fa2733b9a5442d9b0ef82. 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/QM6P42220342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5a2e842ce78d7d02b9adda9c0aa17c99cbe200728064392395838c921f7e2fc. 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/QMDA62221816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f9e6b1e8b6217404c28c19cbd7942300ec4bd9ab38b99c1018fe9c847b2c8cb. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/FRX452324959.
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 0xfb58dfd1a6d69b266622895ae6aefb7f0c52cd86a801a4d0accaf7d1b94a3b46. Chain 2 (Bitcoin): anchored in block 960161 (2026-07-29T22:51:26Z), 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/FRX452324961.
Bis - Jovem Guarda - Na Onda Do Ie-Ie-Ie Vol 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ab87d1f9f676b4f428380fef6c20a4bde38b7038c09a9679ea998dae1d85ef7. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/BREMI6600154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfdd8e81e8c9d6b4ccb258a67cfe413d96d5db219ea285bc1dfe24e27e05b86f. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/NLRD52410307.