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 0x7ecfd67f5df2274a1f72685d49ede5c3a43e040169a1925c71e68f3fc68c5f69. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3dd36f62-216f-4f2a-bba7-62c893b1fc91.json and https://artists.proofprofile.net/proofs/artist/3dd36f62-216f-4f2a-bba7-62c893b1fc91.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 0x39469769d4b83c01c0c5ca3b9cec9ee29e5e2a435e45dd8d3e8183dc03de8405. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/TCADY1891116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x911e9dc62c2f75a26af45ab9d26f075f4d38668e469dacc417dfe594f1cb8e93. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:27:09Z), 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/TCADY1891132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc301c9a4d0aabcb160b9aa1bf3201f55ee01cf046433c635960e0e1af991e953. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCADY1891152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf269ab1e5d3fdacc742e55dae0f79bf286c658d03d1c84eb6753a04331afb638. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCADY1891820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3d7c88eefeef478d67a69fdb543e9e6e38bc292d69f7371ea88575226eb7f92. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCADY1891211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8112ab366739b0fc1433127b3211a77cdc7bf4cc7101838fda20c239fad3744. 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/QZNWV2179485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03d08916b7d7be9c7d630105e5893f59978c3748154b40758dfa3703f99935ae. 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/TCAHA2370110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc85962cd2fe2a4c1dae01b7a22df373d37415583a706c1ef3449dad2cd8c07af. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZNWZ2370397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf76896ccd476e1d961d0b192c413171041e668d179148485712c63a5afabc47. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/TCAIE2473107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5124ce0fe98677e1778cd82361cf935136455532f122cc8afca4e7b323dc6a8. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZNWU2570704.