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 0x9ed03a7e948d09ac4c1f42fdf20472c887428f891e528fc8b51245c337acad5e. 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/ec4ee20b-2b35-4325-9b4c-29028cd89902.json and https://artists.proofprofile.net/proofs/artist/ec4ee20b-2b35-4325-9b4c-29028cd89902.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 0x276daffe76d868b8b0260125fc577716250d041c039fd9d8dd5fd6393b9d6c28. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/USPUP0810168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53ba8296b330b6ed5818d3f5b0611a7da4459c5a1de638afe6a7df9f7e881de7. 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/USPUP0810169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x001d313a4dcdf76b039e6d9881207000d89dbb62b4d31611240d75632cce785e. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/USPUP0810171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4328d4ca9b8c9c750f02af1c7d44e8184074e6a23807dbfb2a5170ba6f2ff0e7. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:12:30Z), 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/USPUP0810174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf01f1d7b54d5c31386cdd35af739756ad18a157c3eb05683fbb1591f69d13a73. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:28:35Z), 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/USPUP0810175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf9a6dffd797390b92fdce7f7e32719862ecfb8071b09911464cc3e499e3c377. 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/USPUP0810176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0707d80e2f36b36e410dd306072d8ad8b1b1403a664f7fe770c8a9afb2e33722. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:10:45Z), 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/USPUP0810179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb17279280701f3ea12bda16758b566a43caf259c8e5a4744f7552607e43f5da5. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:00:31Z), 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/USHM92097456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a16b677016dc47045aacbe27d0b4ecba66cf81954e83e66d461fc054b08408d. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USHM21638852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x939b1bc4f91290e3eeb3e3dbf9c417269adef63b57f7886b6b70b986a2abb0ad. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T05:05:59Z), 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/USCGH2151483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ba5565489e4d2db1d0971ef07de6b7c40daef04b42b44be9b6286b3bb8929d5. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T18:29:50Z), 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/USX9P2446709.