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 0x3dbb987737c610dc59226ad93c6ba7e4dbc4094e5d631843694e2c91e12b47b0. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4f01d9de-ceaf-4a2b-9679-52cf2d35bff6.json and https://artists.proofprofile.net/proofs/artist/4f01d9de-ceaf-4a2b-9679-52cf2d35bff6.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 0x019a5151cd2b9f00d0b67b5e4437a89635aaff89c2e4bf2fdfac3da06b916e25. 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/QZTRX2281599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xada23ff71030b014a988d646983ff6bfcdac121d4fb7c4741aed67736996a61c. 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/QZ5FN2387341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90465a65fd8c779f4d46a52d1d5e3e7dafb4f9144143263f3539b707efb3e157. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZTRX2245633.
Amor e Fé (feat. Phantom Mob & Caju Clã)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a011be6c6ad27d07a70289a2123b4dc31a230eec7e5df28438c986864a5593c. 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/BCXVW2200014.
Maldade das Ruas (feat. Did Brock, Murillo Zenki, Phantom Mob & Caju Clã)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1080c344bfdf7dddac1397fcb3a73fcef586d3aaa18d7370ab864af374ac101d. 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/BCXVW2200020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eea4bb5ef926a3d1bc133d716aa17b9e4f502751e56e58c0a140b849496544a. 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/BCUDJ2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c4e112abaa3022c687715edbfa41dcb6f27e5c7d7504d48f6ffa248628d7cb. 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/QZGLM2109496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3823dc0ec80bc0d2785569a118c5a30505fac71e3d85bfe0a8fb191b9290778e. 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/QZNJW2094955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x653121b4294436a8b6236fb45aa98c4262ac75239c34bc783df8dea6f06f6c60. 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/QZHZ52012993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44ab39d3b61eeeae16637cb73f6410ffe7ff1c469e8aca87cad6c1f100bdf692. 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/QZHZ32036600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe058e8a1a44aee8bea4ffe579f2035cecf4b00be07703fe6630373c7c8070ab5. 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/QZHZ31925017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65b725c8f5ed90f8092bf9517afb4fdcb453c37a0437e936910e3e6860a284e2. 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/QZHZ62062852.