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 0x6fefff11e8f52edff14ad9c62139b506c721839719bbb6b2d7bf37190380a858. 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/e116b6c4-49c0-407c-95d8-bf709e8ba65f.json and https://artists.proofprofile.net/proofs/artist/e116b6c4-49c0-407c-95d8-bf709e8ba65f.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 0xd1d5ddcc9a651080742a027ea59e575eeffa547ee5a50515f8d1d58406d8b532. 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/QZVEM2353743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ee1c95b1425ebcd404caaf816701f35d22fc98c4a4ba3d28ae98bcd72e4983d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZVEM2353745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad806420e1d339c1413f1d2cbcddeed486c3a2182eb2a872cb17f3f9b5ae3d98. 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/QZVEM2353747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x779cc9df0752171358bd0d1103a46aa2fa04ee656d016331ab958d40e9835c1a. 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/QZVEM2353753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2759922c3718e497585b1e7be167e9e6cdd3c7aab626729fc871933ce37b7c5. 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/QZHNC2361958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f16c5d2389c66e91861d4455e9f3a6fc2e3e982608760f8e8c9bb14c709f503. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZHNC2361959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0db9d1675e9916708a2b0db00c2ce99ee03defb1a1e9807b48ddd020b4b86ee3. 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/QZS632290646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x195a9eb4b9b8b6c756432b0e45518a4a20e8985225bbbd85769327640fc5666e. 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/QM42K2278023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b80c63405f9999c1bfa62f12483ff3071fa166f476fda7b3daf9e6f7a729d90. 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/QZAKB2130704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af456f8e14a903dec3fb8a031deb38dd7f589558b5f4684624576f4202b5f97. 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/QZAKB2130707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x237e28ac51e0f66193584b523ea9cd48864f6d266e1fbb1d2742630352d03184. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM42K2055404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45208e7fc90384ff88eea9842d06c2a4f0b4c7084380246310e69f985e5cc36a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM42K2008089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x545ce7aa1e46301b63ff175c825a2a2a573b9ef4ddf10887a31028f31d697058. 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/QM42K2023451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28559a1626760f29a1e876e81def3ac734f5f3dd752eb653f93a8e119ce6dd2b. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/QZMHL2382200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ed6fecbf39b7f6bac6c708719794692f139bd15e8873da66a390fc3c6c873bb. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZMHM2345606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d31ccee22fd49e91a95892c1658f4fa4b688c8a684f853fcd06e3734118d182. 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/QZNWY2565580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cd4bdb5f52870ad210fcc9997f2cf5d0cef288f9a2cc027b53bf4d545f89f4c. 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/QZNWY2565581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x415d9c78277c3a19731dbd5024f5150e4d9b72d3498f3bc3f01b28e8c017e783. 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/QZNWY2565582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ec7af1335c85d1cfef2d69631bc0975359cb9c5afd89aa728e70a027bcc988c. 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/QZNWY2565583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44f65a1de5029558627f4817bda7b5a693d0d9733d196b7ee305533c42ca0383. 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/QZDA62582862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4fc38961d1965f4199633bd534e9e22a4083a3b58615fab5fb3721acfedff7a. 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/QZNWY2565584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x264a7b7bd341dfe8f9415b41c02e039b5d93b8d20c211f000d832a39a40935bd. 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/QZNWY2565585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea392d8520a0b76d82fdc8d77eccbd482227d504ceb95928d7d02633820e670. 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/QZNWY2565586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62f953300bf141aef36583c7e98bc21e9b056927dbc705d6efcce52bd84005d8. 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/QZNWY2565587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x148e66a713839dffc3faa8ba6bf22f21fc227695713ba436f8a25744f43edead. 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/QZNWY2565588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x306b8a9d817f955d336eabf479f08e5bca21c05c2cbe010616f3b59a5ef02ec0. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZFYX2515360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eae82260bcba2d6d87a10515be950c53e478822bddf6a2ed6ea9ad38dae7e25. 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/QZNWY2565589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x376e07b87742eec62bb4749c12b165e3c72ce95de7bb5dfd6adab21fe8366254. 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/QZNWY2565590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54eff361fba86636705876a8d83b0f0b6405d4a72ed3c6a4681ada354dd9a5b0. 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/QZNWY2565591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee356905d62b5d25f07b6b4f33390be77af9f25f7b8e764992970e85264288dd. 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/QZWFJ2431654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb19a054a5837d77c27b1ec92d07dc675962cda7cd6f123dbb7df9266b92f2219. 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/QZWFJ2431658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x744cf462122a48a8a05af0b3457c875c2bdceffffd79d2f0614e707b760d55a2. 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/QZTB92514282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f1424ff375c1dc9eb7085fed1ca6bd221943ca22dd818d3063023241a645379. 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/QZK6J2568103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bf9e7daf0bb5d131b8b56f6eb9db1a6da0e2a2d2aee93b68170fba95fc09405. 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/QZK6K2548207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61f94d70f1a2cdedd88365dc85e9b20253f8f876133cbe411f6c5cbe39478301. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZHN52513591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44f65a1de5029558627f4817bda7b5a693d0d9733d196b7ee305533c42ca0383. 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/QZDA62582862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x306b8a9d817f955d336eabf479f08e5bca21c05c2cbe010616f3b59a5ef02ec0. 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/QZFYX2515360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab1f792f511b0eca21238690493a0348922d6215e1c36b073100e7d569abd33. 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/QZMHP2550969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf41499856f11fe06a576c6b234a138545b4f0e70407d2210651d3e7f193bf955. 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/QT2VB2432270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0afd35add65203ff7e54785aa9534df09376f279582f17ed1d2280cdc0d3106. 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/QZPLS2443729.