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 0x83b16991e30d870b8dd6fecaf505b93b1804747ed01751bcd921fc090d05d684. 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/8090784d-d3b1-41f5-86c9-b80e8a3d4a8a.json and https://artists.proofprofile.net/proofs/artist/8090784d-d3b1-41f5-86c9-b80e8a3d4a8a.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 0x05cfe8fa09578f9b20a1f05bf6abd18e2e99d2fbfbdd36f5338d5a59cc0d8c7b. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:04:50Z), 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/SEYOK1848960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c6ccfb75117e1bcd194ed378fd2e89708ea87d938ef180ca248e488f3730d38. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QM6N21976670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c6ccfb75117e1bcd194ed378fd2e89708ea87d938ef180ca248e488f3730d38. 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/QM6N21976670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37cfa0963f3867b31a51358877dfc5cdb9eec06999ad057a777a0e1e461e4039. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:07:20Z), 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/QMFME1969876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa0727e09b132e8da288307321207907a162ec42b6f2e311363a09bf6a23d9bf. 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/QM7282024465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65e1575e2b337662e52ba112ae320419a7288fdf9011d73a51d5b0e64aa773cf. 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/QM7282099020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1e4a772acafd077000fe6c4fe6291cdb9d1a7e2762009f299f297d9f4c99b24. 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/QM7282099021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6882de86f5a98c7ec4f451690337e17f769011d7987dd9520cb392ca955446e4. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QM7282094002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73488f8de89a6943a6d1f7a890bfe030603f0ed7539868892e778e5de5a4b4fb. 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/QMFMF2011347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ca86c29fbbfc4d7cdcd306a585390913c653f1bdcd1b7ac2c51d18f9b6ada9. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QM4TW2120585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbbf6eb92553b754d1cceb7ff3c5b8039bf22cb4bf4bb54beb27303bce08d5be. Chain 2 (Bitcoin): anchored in block 957826 (2026-07-13T08:56:09Z), 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/QM6P42177565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d196a7ae5b18146b77bb57059563aed81c029b4daade12f4bdb1f6a26bbb804. 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/QMFME2135064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd81c1f8cd314b223d7b2ca843b413a9fc6447a57b3fc2afe8d49a6f3fd0b6a9b. 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/QMFME2182437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x785204fb1242b1613dc86c0a873882a0ffbb1e94b1f8166f72edb97838ea6722. 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/QMDA62142540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7edee4f4e7748feb38900e839723b607adb27c075bd5164f601151509d26c66d. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/QM6N22278142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedd6866cfd3a450bdb2eb500bdcf296eea348fa01a1d873edc759c1af441d6d9. 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/QMDA72262865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc27f3024846b4e2c0450a8a5bcf9c0949032d73bddef5473a2d6fe0da4f5da2. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM4TW2220041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb0eab74a51f29add8c8299da97ab3a4433b7328ea6db131bf9fbf112265b381. 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/GX8LD2316176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa1ce6a6c2684460c196f6e872038c8b0cc93b0084849902efb8d7f8dd559ee2. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM4TX2147183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd202900d4e604ee0291cca7f886d19bf44bb240a15803c396c293d9b48a6c72. 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/GX8LE2352026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d658d27dd8a558cd1316dbf5ea369a2a8fe7475dd289b14f23f54b3f1df1127. 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/DGA0H2358511.