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 0xf3f1a3a6ed9e22e192f4e37081bf3ce833787fc942adbff0cbd09ab9f9c37db2. 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/d044bab0-b4f7-45f8-9b90-9d315bf33ff2.json and https://artists.proofprofile.net/proofs/artist/d044bab0-b4f7-45f8-9b90-9d315bf33ff2.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 0x220069bd1d0e8b8f9686a63bc4b69384742a0cf8143313d7dfb28919ec6cb17d. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/BX7MG2000170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9da7b1b76c9bf4c4cce84438433f8e90cafe2a0db459926a954e799f33a476f7. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/BXT8S2100092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5026b536f73574be6e5d20a59de7a373072a270f6ee6ea476917fd93cdd7cd0b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BXT8S2100090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61a1cdb38fb5bcb99f2a0d9a1464592390f29d336e70b839223656596fe6ead9. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/BXT8S2100089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38580a1f4e9daaa717ffa7c9ac41cf30bb8ae5d62ae291307fc7512eac692134. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/BXT8S2100086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x258c9631a241158c759e82c71c0392e4c1d4d427b2c5beac1e0d5dc1980dff4e. 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/BXT8S2100088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa161c4fb9d013fe28dd7078db62e03c00ac5ddc74e5bb16d74e352f5bbd7c2f2. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/BXT8S2100087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd9c01e5e76865667b278c1c1eb163d2c02dd06cf6d71650a2db58cdaa80428d. 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/BX75Y2400157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd9c01e5e76865667b278c1c1eb163d2c02dd06cf6d71650a2db58cdaa80428d. 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/BX75Y2400157.
Meu Pai e a Praia (Original Motion Picture Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x620d70bdb99e29298229548f6add8a715633f583ffcd888e48cf2e5f4c5d9d56. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BX75Y2400196.
Maranhão (Feat. Carlos do Complexo & Wax Roof)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabe0f22f901188947c64a4de8a96876609e283f0329cf985b89d9373207089af. 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/QM24S2008240.
Engenho da Rainha (feat. Carlos do Complexo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc29ed994e37a8dda117086742cb825e0dda3eb8ebdec89af633b67b7dc13b76b. 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/TCACY1782681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d74f8e526e6d960f1421f2be77c4f3437700991310451839b783779c3da7183. 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/TCACJ1595688.
ROLA GROSSA, QUE GOSTOSA! - CARLOS DO COMPLEXO REMIX
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06081881eed5387b3d5a7c002b94b02d6c15edb4661df997cf245f2b1fb84005. 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/BKLZF2400022.