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 0x456867dce8c35afb1f82eef8112773e3e56ffc3e80b29182a5059a8c696edd25. Chain 2 (Bitcoin): anchored in block 953636 (2026-06-14T13:03:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3818291d-6b8d-4c7e-a3e4-6f5d0fc23fd9.json and https://artists.proofprofile.net/proofs/artist/3818291d-6b8d-4c7e-a3e4-6f5d0fc23fd9.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 0xeedef93e676825141a7e5b4d85bc875b4e2186b3b9dcf78db0bf90b1e0e44276. 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/QZNJX2211496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4594f660f9d3fc9d5dcff17c6b02d9f65df39e8064b0e434854f14d8e3b0286. 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/BRJ052400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa353a05bc14aaba1ca15a6892a5b279e50790f93cd1d9ddf22e6327aeac240fc. 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/BRL4M2000024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa31405c4539c51ddb03b177354255d3520291d035032838dfe9d2fca5c04ff3. 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/BRL4M2000025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77b568bc16af8a26d31f46d9634ecd8c8fe3ee2cf9e80198e22ce2358914e37d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BRL4M2000026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7c6d7fc492c44d6793d22b536c0b4eae094927036d0060978d70d4a83372243. 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/BRL4M2000027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0044621f6f0852ec102eb5a4d1b8f23305f65ebf46c75866a9276f7df0bf493. 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/BRL4M2000014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x875b6a6edb599d1f5386f8bffe5ff27c1cdffe69dbd913501609ee5b637c897a. 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/BRL4M2000028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x008fc68cc5d19bf97f9f28cf40640c5fc943e22bba26f11d36f1090efd4f5fb7. 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/BRL4M2000029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf045177848b917c98808bcc92a4bfaf2531c3cbde03720ad50284122f458a1d. 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/BRL4M2000030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e41ca8ad2ab0c838b91560ded2a100ecfb097355c62234a4826d19f24dba6a5. 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/BRL4M2000031.
2º Festival Xetruá Lavizala - Kuxonga Kua Menha (O Ciclo das Águas)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b99ed1ece85dd91aa9f93db6d34091735f8c0bbe0e6575e08437489c77ab16e. 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/QZNJX2348297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15899eab5856c8ef5d2abd82a2f55b56b5b4112b4448f9ea41044ebffa316a8a. 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/BX04H1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72f8b4e612a7756f4c3eb57469a3ce5f7c52fc1bc4be7fbc0e8322ae51bbc67e. 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/BX04H1900007.
Você Me Vira a Cabeça (Me Tira do Sério)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd2028d2a320db96b3af46d49656e5d7e4e1fd2330aa807896224cd52cc9383d. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/BX2CJ2300001.