Helena Meirelles (August 13, 1924 – September 28, 2005) was a Brazilian guitar player, singer, and composer recognized around the world for her talent as a player of the viola caipira. She is one of t
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 0x3561f96ef2d2bdfacf03ac9aa507b2ff59a23819dcdb6700ae9547a54f6d48ee. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2af08d25-3b19-4df3-b791-cf930938dca4.json and https://artists.proofprofile.net/proofs/artist/2af08d25-3b19-4df3-b791-cf930938dca4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Helena Meirelles (A Grande Dama da Viola)
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 0x419496753d5370224e422ed8ca759d06e3e4f6626e0059ead03ba66411bd10e8. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/BRELD0200123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2538a13e0b1832c2f048922de69c1cf6b7f26a183c3605820f9542132fe48f66. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/BRELD0200126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e8b134107311d254bfabdf8024cfb748a1889f4c30b8140774d4d04c7919e77. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BRELD0200133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f4bb451827805456d418185364c9986ff462302dbf934eb43b1326393d923e0. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:59:03Z), 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/BRELD0200282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bb8768332583abf9282d01e78e3dbddcfcdc2c33b047068a7c4c34297ceceea. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/BRELD0200283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f3d2e50bcc0773e8d30bcd242108af2b6eb80b1ece55d421bcb6863a7e1402b. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/BRELD0200284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc124a93e409ac703f139819e305559a28ef1fb5f14e85bdce90b3317f5ef84eb. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:17:49Z), 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/BRELD0200285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2833b50ffedfa263b11af17ab488139e5fe24cabbe8db2e8cec43a811be57720. 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/QMFMG1369993.