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 0x18a9944ebb9ad14f60124dec63a0eb87567306d217962d77e0cf0ef7e517aedb. 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/eef4b588-75c4-482d-9dcb-26ce315bd80c.json and https://artists.proofprofile.net/proofs/artist/eef4b588-75c4-482d-9dcb-26ce315bd80c.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 0xe31f72d86733f7d5a24ac03d7f5564fbf00e5ca57143ea78e0107052a1674253. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/TCAGS2202290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cf1924046c7de395027bba6afc2cc68dd6898f5dd3d84630d24b02efadf9167. 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/TCAGS2203071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x774100eaecce49b4a7039223223472c1f03936e771be0692c8070910fab35a22. 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/TCAGQ2231603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aa01532fa655aceae3b7af74364f499cd4c839aeac725fcec61b8329951c0b2. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/TCAGQ2231609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc01961655450c688a41746460f87664eda60c52b2f0ca8500e5952e8205eb81e. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T21:02:02Z), 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/TCAGS2203034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d80d9e660c39d19d2884b22205f51518501232ce65a9b20a1fa4af44cc28d75. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/TCAGW2370425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29a2515d253df2a68906938852cb7ad68681cb4e57fbe72e4d69cb8bfacb803e. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCAGZ2339117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d9df08dae5df2efce3535f849d75d9109c1d16031084fab64eaeb5a25ef1a3. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/TCAHF2382980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75188657dd32eb89bad4e06992d8d351292b7bb785d87fa4d47ec0069e529e93. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TCAHQ2348832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2efec4098c5cfb2615486c5497af224199cdcbc6eae63f7bec90b5efdb69f3f7. 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/TCAJE2423254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x507e5fa99c0f42dbb0ce58092f45411a6db4d6d50413d06c732736f0187d3148. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:05:32Z), 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/TCAJF2597958.