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 0xa0618c2a07aa34dc53803959bd830f32344c9eb51b86884277db7e70df60bdad. 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/3d4e8f60-20cd-4fe5-8d69-d8e4ae91c2c7.json and https://artists.proofprofile.net/proofs/artist/3d4e8f60-20cd-4fe5-8d69-d8e4ae91c2c7.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 0x74856bfa7a6fda2015fd00844c22c967ae5442f6f25ee635153f1a64991b8465. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZLL92229050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26466f65d9a6c34700d7109cb7de12872b4bd372f8930e32930dd1a3e4c05122. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZK6M2363940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd57a51b823bd5850263909d1797a9819714963d2b53c0794139ec6916a2412f9. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/QZK6M2364228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41291576facb85637b604a64d6dac8a2074dd0f2d7d3642eeb8fc615f2b41149. 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/QZNWV2343858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd2282611949d31ce7163628bf0ee059ca1f47a6c4ea183bb1d3c6d25d041b0d. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:41:59Z), 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/QZNWU2388910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5cd4b059867dfda1900e2514955ff5f21dc6dab8d43e5fdd6f8e5d8953001b4. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZNWZ2387545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd75379dff84c3d2e6a3ca7af8300adc640739de8b4ea7c29b518c88b63972a. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZTB22372285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda345ec29ac85ed0dcd87743613b132abff301707bf2bff69b0711e176752a39. 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/QZTB22361885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7443538e066f98485086e237cf4c779df4957bc46907efc6029f9d67814e417d. 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/QZTB22364745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd79c5b38b88db1bafdceb54b87cac244d7fa72f71e97f5e68c8cf8b6b7cf7b03. 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/QZTB22365474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f45548466d70725018f4ef97998caa40c2135c75e7ebde3efaa6ea83bb28530. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:23:14Z), 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/QZTB32384152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc39b9eddb55c118f55e992fdfd585ea349120967135f513173977a6976e49d2c. 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/QZWFN2340204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe31c2f81184e3bb8b986d4c961b03c5bd94800fcdece94cee4c8402e9049f012. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:10:02Z), 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/QZWFN2336945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba7ff2f9a7b9b8139c0f4a6b63f9c4c7b5b878763c87561e5de2295652ac6996. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZDA42481762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5e4600841d7cdd0b581ff1e714453ad0f06743798c6d4f88efedfe2965cadb0. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:38:57Z), 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/QZHN62563514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23e82846968f7a8d3a8ce45e564f5b14b29a41661c8688bc06a251f7518abb87. 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/QZHN62546896.