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 0x5f6e7f4d9b407f4cff26a10776c5b87948721d8b532eee2d91bba7f074a8fb1f. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/99ec4c78-15ad-4147-95c3-d807dee5dc1a.json and https://artists.proofprofile.net/proofs/artist/99ec4c78-15ad-4147-95c3-d807dee5dc1a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Base Piseiro Uso Livre Guia para Compositores Ns 7
Base Piseiro e Brega Funk Uso Livre Ns 6
Abertura para Show Forrozão Estilo Tarcisio, Ns. 1
Abertura Para Show Pisadinha Estilo Barões
Abertura para Show Piseiro Estilo Biu Ns 3
Abertura para Show Piseiro Estilo Zé Ns 4
Base Bregadeira Uso Livre Guia para Compositores Ns 11
Base Bregadeira Uso Livre Guia para Compositores Ns 9
Base Bregadeira Uso Livre Guia para Compositores Ns 10
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 0x87072bbec9c02ae3e9c3a577c573b399fc95d207f4edcc71831b07bbd16226d8. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QM3DF2248984.
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