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 0x78178516ca866b862f1423422e676720e2599c9197ef344759f200f313f3a124. 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/f755bf09-7361-4b83-8f67-f0cd8bd0053a.json and https://artists.proofprofile.net/proofs/artist/f755bf09-7361-4b83-8f67-f0cd8bd0053a.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 0x912a0d6d94b2a1c02a355c8b28036247301eccc549156e8af4e59268115089f3. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/US3DF2519519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31fcddbd27c78fdfca50874be40290bafb7d58aeffc9cc137c428c09e114c890. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/US3DF2519520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7822deb01cff5c28bd91e68599cbfe60bf578475a94f9cb27516179f91bd55b. 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/US3DF2519523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08a0ac58d9ace07ab9e3d97c12493fe384dda5d255b7c5452ccbc5a68c6125a2. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/US3DF2519524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd67353291251f369e4b5a154783d90aeef122a342566a1a47ead1bba216630e9. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/US3DF2519525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb65c1c8f3c21bb8e9549f459bc76359de1068c1403ca1502d3e96357ad05b57. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/US3DF2519522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf42b5b3e9b0b17ee22ac860d331c2de5d7f018fddeae50b751f93dc6e99216d. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/US3DF2519521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa333ad1265dfacbf7d5365b8453b25fa6486b1719e6963d1360f48651217c12e. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/US3DF2519526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62e1ea9fc0cb81dac37500093948021b007319cbf56dceb8a2f5cd1069e4411f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/US3DF2519528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66f61be1a099618283f2d55f5374b988e86e0678860ea97a1619470e59a4fe51. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/US3DF2519529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04d86a4b16669030209d3d4f39666ebfee688f0264b9ae03484e3d880159648b. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/US3DF2520153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22b10ab1ae01cc037b9c383f75335c07e93a57e7e1411be4aa75d8ddcc263078. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/US3DF2520137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55056ca6b1d183f42ac47f5998146d71bd7cca11a02574538ab503569fa7a3af. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/US3DF2520146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea1fb55dfe86a03fab36f93af2f213d69406c12868b2b70186cfff315eb88bec. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/US3DF2520158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc91fc519a431e5795497a51d8e72289d3ec117618c7c7339ef7f590c7b60f487. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/US3DF2520150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ede870fbcb7431747bf681264c90a16ba47e36d2f13ee903751f28fb9b9ba92. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/US3DF2520162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ed0ae928a51f439f5b19edac077359b88eef2e05448b230767cd77436d0804e. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/US3DF2520161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x288e897a66ed52c49f5e132ec34387649f51d2415f4b28ea684a04fec7d6b094. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/US3DF2520139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69377ef60f0098b22a7c7861c7818994a01e9ad08d396332b6f36c6c4b210c2e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/US3DF2520163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72bb34c3d2252ab9dab879a2dec830d185c4ffd2c1fb055287a00cc9798e039d. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/US3DF2521086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a6e7066735ccb533fd3cea66b6381bdf47981225e73ce648b545296ff7bc53. 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/US3DF2521085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf854622d5d59e2c6d481c281b12e0f4dd57d4dde9544188fd5d823005666721c. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/US3DF2521079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2530050c9857e8a534324b5c0afd702fd3aff09d5b2f33bd29ea74ef722a7e8b. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/US3DF2521089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17aa59ac5452b3ee0f57bc4fed9a3a6789289e4d5c074836875a191aba7f3845. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/US3DF2521088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18cef600b4f6da765625920b085b62d674119599c42f9118994576425e1629c1. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/US3DF2521081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45a5df1cac5ea0d87d3a125369e1e4e96bd6fab1f85b647710757de4149d4f32. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/US3DF2521082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x652e4a1aa50bbc9f9d74b6cbd924783352cf539592bc125c4034d732172d138f. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/US3DF2521080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa77b9e028ae1636d0240dbaf3d188bd9910e08e268ed4c9f04a1002ab8e99575. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/US3DF2521084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9654a5be2bdaf62b3f0ccd363cb6ce9a4d2f8a6fbeadff0a10f41c7628a48ab5. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/US3DF2521417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf36609bc27d7f15d3940e1e4ce6c0ea1020a2cc90dfa3f16e49bec30454f386. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/US3DF2521410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0156a3b980319f81e8b70b5c79a6fa5fb56e590b374e4974b1b05ed4f7216d1a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/US3DF2521414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd31d12780e90916b48e494512bada0578c2a73b6cf7bf9a8f8a71739cb04b702. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/US3DF2521415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa00a5952866aac67f1feb60378ff3321861b2e8acfdd8e0b1efd9317678f9dc7. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/US3DF2521411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23c6a6e33d4efd04a2b6ab8d3ef8634c9e90518a1a21d6743689b5326245a854. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/US3DF2521412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa467a062ed60569d7a28f4759755a08d4825bacb0d7819c18dbd5704f4e35987. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/US3DF2521423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91853b6381669754f4a46feb3004684ae359660c6b12f51edebf9db21dae3d7d. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/US3DF2521421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90b8a17d2ac91864d9f5eea0d87b4917713a57a85745c25e218bb85dfd284695. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/US3DF2521420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7e005e1d3ee160118ad2d76578246be02dbcb9c07fd925686925b7106e96128. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/US3DF2521419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe06b580f470cc9facc241ed1483291e3a0f38fc928b48f7923f30e750cc476c6. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/US3DF2521416.