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 0x54aefedae95dc1f7e490efe76c0c9829aab6c03576790a6914edf9615d2985eb. 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/e44461ae-ad5b-4628-9e95-661f1593a09d.json and https://artists.proofprofile.net/proofs/artist/e44461ae-ad5b-4628-9e95-661f1593a09d.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 0xa8605cfd934f106665799d5607ee9cbbf8520d4a5a6876b969e55857579d8c9a. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/TR1900200985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa88e9df2db4a381fa1ac78ee00cba8e30008653146ca8ec7de6d5228aa09b572. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TR1900200987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb9afbf6ebe016b05a185c5ba89ce070d20309151d7daefcab2ed40bb74cf886. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TR1900200988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b848e98135b180e3ba031a6cf4e5ebab6feca661246f01d447963599cad03f6. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/TR1900200990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d9a0d048dba046f73d8d2bd66db45392a54d8d1678430b9b5acd6a254065334. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TR1900200992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b5c469f71828ea27cd62bb1b9f23b3eccfbf229bd1e8ce2e64b766d6a27c3ea. 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/TR1900200993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadcef46293324ab04a1d03cb0edc4a80dabf898015833786a512d711e90bfcf0. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:02:49Z), 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/TR1900301071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab65d9b18f2c2b2fcfababb836c8117b80cbfa07b92fed34e3171aca786ef45d. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:04:24Z), 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/TR1900301069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7aa5d7e77a719f474dcbb3e56d66dd5285c677fb48c9318c0a3d97aeada5955. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TR1900301074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x080b897d14b3c0f35bc1c2ba7499665c5dc13586be26ad03711bad88c344db87. 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/TR1900301076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56c5d1f8b8236bb1739d4bc1db4bb15d72c86531d9694bf738a3467f9553a258. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/TR1900301077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x479fe70e911113479c83e3d01b90950e9ca912fce89e781758afc82d79fa5af4. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:10:26Z), 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/TR1900501225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1637f30945a9103f3eb04da436d00ce2b099900c7b27b62cc42de0a39f59377. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TR1900501232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e254dff160fb704a5009e897f8a71ba58cad4534b63521f48f791b2726db16c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TR1900501228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b881a7f2855b554e7c8910937b9c70f8cfa9b17396c84fd6634da65d6431bc2. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:26:39Z), 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/TR1900501234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77bdaa7f1ef9ee679cfbac75b8a36a47a4d698a3f23f45d748f0e1ab61c8ae5e. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/TR1900501230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2c95f1d276eed00ca913b4e4cf5ceaeef6f1534e74864f86cced74d7d725703. 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/TR1900501233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb99bf1b1e1a5c80192471aea8174eae02085e388994397246aa89f43995d43e5. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TR1900700747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb62646d125cf47e5e90b3269acec5e6514b76bdd049cc5e1874795d35977b06. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:24:43Z), 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/TR1900700744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0d9d734b6ddfa7c60672849ff8f21d29ea65a4b560acc10249d56f962374fbe. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/TR1900700742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4930a017c81ab7d041b4b943cb76354180a4bbfc2f4eaf1a3c89759577890356. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/TR1900700746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d29f4082100458bb4ed77e0602b7f7c89cab5e87c0e26ee7bef7d7cdc074472. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/TR1900700739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52078ba9415f5d9a7d66822ecce3d79ef215832653a785975b4bbfe33f46edee. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/TR9021000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbfb183f1a25816b20617ee33603f95a2f9f42269af0177450530b6c1ca1c701. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/TR9021000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40c228e4d5a29be94dac362964090d3350fa9add852d37b07846cc4e0499ad22. 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/TR9021000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaab5c37d03a2e20b50405af1103f5e38e2fbce389fb4c8b8d92f37d5f07dc80. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/TR9021000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf79b9b8ba4364bdf9825311fc97f1d12a9bbe68230d36dfea0d7856b7fb57b80. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TR9021000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf16bad2270000a3f27e08d1eb3979de3f9f6bd475eba62a43ff4dc3103f6b9cb. 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/TR9021000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eed68fe48fa4e5da184b5d119021be684d52f3fbc5467f8c3f5d7f84e36d63a. 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/USV291447985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d94182e3d9fb5159c4c3d38df44df2962e63aa2a1ebbaeb166385760342ff15. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/USV291447986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d30360e40108a598647abb2f2f673a71170991ab75c290d523971740316984. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/USV291447988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0206c72ffaf75dc089cf012a05a0069b3f86c7c95e3f78df519ca74dcca11f83. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/USV291447990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16ccda740faa27be77bbbf35b79d0bd7dce9eeaadd6f651e10e29771bc654822. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/TRAVZ1900040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf21ff8a507a762a6f2ee705e054ad3ec50e06e01b73291c5f3067d4fef99f14f. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T22:43:43Z), 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/QZW9M2318585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x183e6113741f7ff27a454407ecef0cd905d92d0d6d9f892fbac564bcd3b5e124. 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/US7VG2493303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c9977d1e997fc744820cc1f4c6d986f9cfe5b492ccc77d3d0429f329640c5c4. 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/TRCLH2500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf996a2353e21dfd74818deb74b74b66dc5195a648039f8d1e70e01634bf07b1f. 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/TRCLH2500050.