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 0x113d4b186f851ee7a767a3930a20b16f8bfeb28371ceea6966d5a0fcad35e3cf. 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/382f7202-370e-4d20-b0cd-1f8b663601eb.json and https://artists.proofprofile.net/proofs/artist/382f7202-370e-4d20-b0cd-1f8b663601eb.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 0x62f83389d073732fb82d579afa5de4c051548cbce14452de66f4413cb47ee67e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM3DF2272721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x143f196d8b2127c058070852e2c917e331973183c5ffa0ac5b7b92e2fff658ca. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:55:02Z), 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/QM3DF2272724.
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 0x349c232198df467b954f7d0a9d285247452f282757e83a4fff339695a746efc6. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QM3DF2272722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2f7e254476c86f5236cfe1042eec4437a2eb340e28a3866cada82819615fc0d. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QM3DF2272723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0501bf5ad7937bc8b421677710323d150806119ae00f7e51344aeec60d4ca80b. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/QM3DF2272725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73c91b1b77f41416b2bf38d6d71c059705701b75287e1f5cf5d147016a0dd1b3. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QM3DF2272726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eebfce53bdd767019deac10ef84b2de861d64767f9cdd96068ef30e6cc28d29. Chain 2 (Bitcoin): anchored in block 960165 (2026-07-29T23:29:40Z), 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/QM3DF2272727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b54a9d94ad40ec369e19aa7a718c78c71164bafa55842a0670b3e4ba963a9e9. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/QM3DF2272728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5939e96d1d3d4032687c82ff66a2889615c83f44718482583a6992f89e44bb7f. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QM3DF2272729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc022d890917b2d9088c493facf5ae125d2870cb47d79d24acf84912646c02d1e. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QM3DF2272730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd007b5a6550b8b3cdafca145fbfeaeb4c5d03aea3a2d225453085d79e6cc5c41. 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/DEQ022117763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10eebf3cd3f04f628421031998d2ba1cb6cf7ff1eec9083166a25506f91e1d14. 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/DEQ022117764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7522123678bf3edb4feb2cb73b64340660790369bf37db8d1ecd995374c82d2d. 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/DEQ022117765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d14914da81bfa3520a413855f8db8e46f70bb80c9c6d776463d991e07603d58. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEQ022117767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92238d610d6f22536293509d03896fbaa5cf33b389f9196e5e03bc6554783c08. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEQ022117768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74aee3d329e0d7569792671f41d9b2d422c169fb974df6a25fad996e09c94780. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEQ022117770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a44eb7e48951feed91814da26354b6293173260c201c39fef71f96570ce8ac0. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/DEQ022117766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5634638f5989fb579b7f880314cac1dc5406adfd648a1af407bfeb767169d68. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/DEQ022117769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe15fef421fdfcb499f7da2f5f3a44870ce226c9b6e12f15ea574eb6bed10b61e. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DEQ022117771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b7027aee007290bf6492b848f4594fae934901f0251bf57c8d91a3ceb1bd054. 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/DEZC62161635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8285a8fe04aaa03e47f0c280b205db0d560f02df2b9a04af8ff2ad8de64a8bb1. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/DEZC62161632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb95650f881a249b374f7b91897b593f416cd95b671050eb13ba4b66951064283. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/DEZC62161634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b0afd2303368811fbb035c6ff36d27dc3d50322dfd284d3f1645936d84839a8. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DEZC62161640.