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 0x7fd1126253c46f38279e81c33d3f59d33eb66a1106776929d00891bdf8b0635b. Chain 2 (Bitcoin): anchored in block 953610 (2026-06-14T07:58:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/14111cd9-234a-4d6f-8c9e-a9c0344569e3.json and https://artists.proofprofile.net/proofs/artist/14111cd9-234a-4d6f-8c9e-a9c0344569e3.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x648ee2a1f53bf7ad4a848083792ed9ed2d05f50fe2a278ba5ccd08207b9eb651. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZ4JJ1602253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fd721a323f155e1e4a945765e246ec4db5151d3016895dc03f953c51f915052. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZ4JJ1602254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dcb1707bc210d229c52f7bf503b5a556ff6b06d3e44c12d9f82eed44bde60e0. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:20:08Z), 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/QZ4JJ1602259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dee94a7628fe3d1feba8948a659400207790b8ab743d7ca65fd277271d8d823. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZ4JJ1602260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8d63e71d96a2824ec9c08ef2b52f9753e03c20e281c31ad9ea9162560973234. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZDA52096704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6294eea3d54281d32f364516d3dbcb39eed146faf30b83337ddf2e14ea62eb9f. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/LTA312200018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dbd295087af4f9ef45020f7e11087c6837bfcaf0eca80fe93e0aeb4cdff1896. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/LTA312200020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd8e826484ab912d6cdc987220d07d60fa5f3c8a7c11c9aee1d30e0000e11994. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/LTA312200023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcad0b6cbecb5d7304bc271aab9f2369b8a3d8d42d7ef061adde23e05c37c9762. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/LTA312200024.