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 0x160b5a8c9904bef5a1d62e3b3f947165d74a1890a8ef8524bd490a786c386e28. 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/c604cade-a881-47f9-9cf9-dd84155e4393.json and https://artists.proofprofile.net/proofs/artist/c604cade-a881-47f9-9cf9-dd84155e4393.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 0x1d499835256218dd65f1e782acc985e077c5415f35aa09cf6c1f0784f0c38cad. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ESUV72400364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f1ca6bc133257f121b89b69075280302b0249322791dd609b1da527cb639f19. 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/ESUV72500452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x310ad3ed1776481fe512772e8e97d8ad0a8e46941ba3d145f95c72006639ea75. 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/ESUM72500954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x234e70f65136a30f9a7854873bd19dc18f3241e09053935bb604951dbcd968d0. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/ESUM72500697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf58e36064820c1b4d2ed283f0907fafce007e3f5873344d8fdceb55604246fe6. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/ESUM72500955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4352f4672ee68fb54c1c7e86e5c68a29b4f093580e32ab262b1b0f4a01e3d4a. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/ESUM72500835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71318b9ff78b834f47da08c79b188c7bc392175bcadd2e804dddf7e23629abc6. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:21:19Z), 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/ESUM72500159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a8f2a82368753135dbe0a01c739fc694c73f16aff2927eed308895c56de763a. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/ESUM72500957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f69a5459ad875e418d670fddab0086f7b87d267ac03ed09d9770c593f8d14fb. 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/BK4DA2303762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc746cd562e560eb3d8f371f8d4af8579bdc5a15b93dbb0c2d1a021fdc84b0aef. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BK4DA2215124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc746cd562e560eb3d8f371f8d4af8579bdc5a15b93dbb0c2d1a021fdc84b0aef. 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/BK4DA2215124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9261819caa99598e580d131d849ffbeb818d046df32e0c359da0fc5016feee29. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USA2P2237347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78d63ca7d0aa5153b9a285f1761321981bb7ba9bff3a1d0fadf6e53945313a8d. 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/ES5152400309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59777c840df0baba1cbf1fba36b363db0d80935bab11057042f1effde9fcce73. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ES5152500252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46c648c93cb28de6f8bc55d8db5c96d7c716c7534277b04c0f2e7c6ada3d8d7a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ESUM72500480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46c648c93cb28de6f8bc55d8db5c96d7c716c7534277b04c0f2e7c6ada3d8d7a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ESUM72500480.