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 0x0d266f36e4e175c351492d73e5b05d88d740cd48dda9a192cee8780f28ba696b. 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/95e221fe-2e19-490a-82d1-75a34778e8a8.json and https://artists.proofprofile.net/proofs/artist/95e221fe-2e19-490a-82d1-75a34778e8a8.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 0x6932c7e3a3117d9f64904e3ceedcebe8fd842191ece252377b78768825a3f2cd. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T07:57:36Z), 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/USCGJ2073290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0bae789a0ea089b69f749e50231341faf9dbfd2f3f9ea9e7f5835c90ef98b24. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:12:03Z), 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/QZFYW1906964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde3c3ea3b356be25f0adc14ccc805eff9665820b9d3804509da33bf02e59fd0. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/QZFYW1906969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64dd85ecb9874c59ece155ebf7ddccb18a196413ac4ef94fd645b00b504f199b. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-21T16:25:53Z), 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/USHM22122207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02f6e6fe6c60e5f6b369704e1cd3c7c9e86f5de91641084a43847ba8345f024b. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/USHM22122208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ef20cced64ee04707d434430bb10476a4bb31ed689882df75b4751c4798fba9. 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/USHM22122209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d3708ea2f4567259f63f7c31772ba970aa49db3f1ec4873622c77959958878f. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USHM22122210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x500bd51dc30ac8c9367987b5a07e2a2a1cbe5cfb80a34a15a258c587c7d5b77e. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USHM22122212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13f4a83d6d2dde338a3d79938dd8ba2eb0be247b30c33e957ffb4d945401b284. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USHM22122213.