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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x325dea3dfee4c09858ee327e466adc4ff176c8e850e4e07e220b7858317683e4. 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/77e34c3e-e7e1-4f3a-99e9-d5ef100a26f0.json and https://artists.proofprofile.net/proofs/artist/77e34c3e-e7e1-4f3a-99e9-d5ef100a26f0.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d6115e2116a06fdaf2f3537280ed8970667abbd3aa3468d0e2267b6cae29839. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCADG1722582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a8438d1947d7fb5385831cb52eea4a02f379bff5550d39f452e270bfe201bf3. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USUYG1221245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cbeab13fd4245a1b6e6a7cee5c25858adbc8cd7baaaf9e5709af0205c7c4873. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/USUYG1297886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2cdd6e485c7ea4a0247ed37d63d786ff334cff22f334f408ab50ef9d2559446. Chain 2 (Bitcoin): anchored in block 958498 (2026-07-18T04:54:58Z), 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/GBWUL2165678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43c47b401917d4c2cfdbe716238a6e8b900c50b9a5c72bc2e9e7698a80c89e78. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/GBWUL2165689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c61071dc09af54f93dbe765069f0b02830ebba75230acf633f4ba9870abfe3. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/GBRKQ2284718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfec12f4c626b5b9baac03c802eb76e7c56a4cb089ffdcf136d831296362c136b. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/GBRKQ2284721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82ba84d976c5d312a7ed52a4183f3f4c132242b71566192ffdabc2bcbca04d79. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/GBRKQ2284724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dca80b10cbc4a36c0e5a0353c5cf2bfc1721e9ca57258d9b7a54167b1b01e9a. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/GBWUL2256374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7ab50be07cc62fe7d166d295a43409fe9f04f24ee6d5ec4de8cd0507819f40c. 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/QZWV32373907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31061f569c5a757ff1355e5426ff58f19d382d644032753fcff5ebe25ee17359. 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/QZZ8B2368860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02dbd0315be0212c1e17a5a602ac6c028429c86d93522b4b80a23180ea86bd25. 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/QZWDD2488830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93a4e3a01162fe8b6086982f137ef1d34dc517255077c6ec30b2b8725be79206. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZWDD2488827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07b7810e6fedea6533daeb266ea307bb6a9709a7f9f756f91f4d5601e36473c0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZWDE2436165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1534e8efdf2f64594a86eb6a7f6acaf1c00c8b4a24076c2f263075565fd110a6. 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/QZWDE2436163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17cf8c11df493d8cf2df328f17ef1404c805b7ce69085f92e52d27a63b31c87a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZWDE2436167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8f8b7fbe68bfed9738c706903154ebac214f38e1835cc29ac0d28d4e7beb0e3. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBRKQ2497904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f6144c54658c527e631c096c53e6ddd98dfec32cb1fedfa966a20c29cb54a1f. 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/QZWDE2436166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdccf41cecc553c9f20f31fd40a5fc5030535a82eaadd690db40c4d87081f2542. 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/QZWDE2436168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8621cc8e162a9ef4ac53040bf43c8c46b73c994075da033830fa82e34f2d194b. 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/QZWDE2436157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f5d2961d1a17d697e5de1710f3813263d0ea369c5522044ec1ee5ebad62e7b6. 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/QZWDE2436159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca61609da0cce9ffc747979d322505723c519acf89e055df8a6ee87fb2c3af4e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USLZJ2533286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x671eb2e2080268d91e39b4e0469666315c222b4b8d2ed27bc4396527361cf121. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZWV32529156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3525d79090b73298ad87f5f9a3a001614b96ca521e08ffb1fd5c82a0927ca56. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZWV32576569.