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 0x37d3a59a9f336ac85cfb85e0647efb54196669550cbbbbb63d35833f4780ec43. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cb641ea5-d94e-49a1-ab7d-9d132d025c0d.json and https://artists.proofprofile.net/proofs/artist/cb641ea5-d94e-49a1-ab7d-9d132d025c0d.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 0x333c3e68693e25b2e5b6c35d8ed754c03331c818c0cdc840b3aed38b5a333ede. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ESA112313563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x845ffc182041bbcd6f87767147bad18c3fb75362efd93c5a50756d3663fa33a9. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ESA112303793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac2f074f573db8c511988effb757e94a03088393b30f790bc85a34e897a794e1. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZEQU2257567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6a7852516fc4fa4b48a4ae124d5086b091d5159f8ab2ea2df641d73a5984dff. 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/QZEQU2208400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x626bfa2dddff3e0a7ec4fe9e6355441356facb5512484493e48b80e95edf5f6a. 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/QZEQU2206919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc17113b815bf1e40918f5bd70d60248677f4478cbb88afe813901fbe27391f94. 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/QZEQU2135244.
Cobra Miga (feat. Kamylinha Santos & Kathlyn)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x635cdeed471b75b12b272298ce0708f79c2c353f1ba61f0dd301db46ec2d19bb. 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/QZEQU2141656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3428877050f70c83a86838d94e9f07fc817291d3833a343488a751cc2e69cee. 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/QZEQU2151368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c4da05bf530906cb3f5f0906f768596657470a7009186de58ceee83c80d4126. 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/QZEQU2147069.
Vulgo Fechação (feat. Kamylinha Santos & Sofia)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6c04145ff8d1d086d9882e6ccea21d9c3d4e1b9929b8e9b186da3cb6d7bc812. 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/QZEQU2136649.
Bate Rebate (feat. Kamylinha Santos & Júlia)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2273b5804fa911b17eaf1545544d6f16abfe86f51d70be0bfd6bbf2e23bb0eb5. 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/QZEQU2138451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15813578e8dc8d497bf72f6dc66cebb0e90c237f5b4f19d58f6ed22f8f2d338e. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZW9K2323048.
Cobra Criada (feat. Kamylinha Santos, Kathlyn & Yrley)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeef5eb2fb6545fb83892da7be4fa06883d6729bc47c06239f8b051ca659386b1. 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/QZEQU2201168.
Batatinha Frita 1 2 3 (feat. Kamylinha Santos, Yrley)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5055de2669a06e5f65126be6c07ffbb3253e30567a010dabf8afc000706814f8. 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/QZEQU2143586.