Huun-Huur-Tu ( ; ) are a music group from Tuva, a Russian federative republic situated on the Mongolia–Russia border. Their music includes throat singing, in which the singers sing both a note and it
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 0xd04ad72ab0bf77e1f0e54bc119b4f62ade008a423fc228b298fdf451998d87b5. 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/2cdb8e6a-b4a7-4a1d-aeaa-e85b1668dbe1.json and https://artists.proofprofile.net/proofs/artist/2cdb8e6a-b4a7-4a1d-aeaa-e85b1668dbe1.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 0x2d070e1be075de134a3641308d570c15b207115b04c8b0c6272723455d89d960. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/USA560558362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa20f44405dccf540eb229dd0c7d4165621a1da0c41a898597183a23cc247807b. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/USA560558363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a28ffd2f8e27f3471f768482144574d60cd4de3a9f749f4159db421c911f727. 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/USA560558364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f9ef07690dc855be4da630f8e5a4a32bc578af5d289a2017865be3f46547514. 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/USA560558365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd510ea972ad8f458e6490883c899b373296ed7f8b84de42003ec95562276344b. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USA560558366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc5f5b3a87f28fce45f86756eba3ba577eb1257992dccce704704d3cb82af7b3. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/USA560558368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x599e7637c47ad87d17e820417dc85ad2029a1d23d2c7d404c50cca46bf4a5d4a. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/USA560558370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x096d9c26aba08531c4947b85c3a2d0d0088995f1f3f1e43903e25e1fbf8cd272. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/USA560558377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde4b08b40e092a9a9d482ed615852990d3218c18ba015be238b2a7e63e8c8ea7. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USA560558378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf771cacee9f3d4df5fcdff4fdb9556a56ed274b2a118315318db4531154a49b5. 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/USA560558379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x029a2c47ac5bfdd0a8621338bf5e2590f4e59a7eaadd658d78ccea947f91beda. 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/USA560558380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5ea0051043ce92b98eed863d55f6cfaf96daeff42a957fd8a9fd02d60b2e358. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/USA560558382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda376d948223b0e8dc24b2806fd977e9d85c9cd149e578346cde7dafb7813d39. 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/USA560558384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9288e7c672aead18dee01ac27011879320368c177ce7cf1ebd91e8a41d82478. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-20T14:08:15Z), 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/USA560558385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92fde2571e107b87b4f10a14cb9ba2136268152221c95d2729e135766433626e. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USA560558389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3642db4823b1a39f8f3b685d3c2a0263f831f5de95cd02c1e823d693394463db. 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/USA560546878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x160e2ddeb00cc1f8e87106b7665e94eb2c8dc389814b5d09d77c9ce3fd92cf86. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/USA560546883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa1424d2c61b178a9e064806373910ae9415acbbef31eca159ae36f7f4c5ed1b. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/DEA710405982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40de2853e39a209fc8e5b81cc464c95b9e41eb8348633bc1a9c0ecebaea9baf0. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/DEA710203970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca733eb355c7c07a9d10cbb541a90b0c3b30fb979af5c1329a75c96be6e74b7. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/DEA710818940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44de826dc5e978bc461e378e171412bf8c69a681dcc58bb19bca03b06f25e775. 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/USWR41010701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f439423a6ea93fa186b2eefef7b15bd500e4231356296ecdca64c178865b655. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/USWR41010702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fb6ddac0f29ba25b981aab0544ef1f490f5175abb0f908c54acf93ac9c2a53c. 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/USWR41010705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6326618d28de2e9315ce1c905ad26169a66f951dce455744ddfe89376f629873. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/USWR41010711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9be7c60330d087ac08accbe4a11c2656c7bbaae5de24ec14adf102db5fd5e2ee. 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/QMRSZ2302814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c2a4b757a9b840e26251bbc7705e3c1908d9c26e3d42f7d4f0a8cbcda86ba12. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QMRSZ2302815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x261e9ae5f5fcc4ed4e1d0db4f0d7fbd4a2920768b92f126a1e58b01d580f025d. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QMRSZ2302816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac0c0007a8913e41e6d5c01dc350e93ecbe9bfa8c0ef5621aa1ba6e432d4736a. 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/QMRSZ2302817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2848a3520a58711b31a34fab8e260f4b194010f80f96032543c2997ecdd9a223. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/QMRSZ2302818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97ed2540aa711a7f591f84f529457fa16dd8c45ef9c40a2796a749cb4d0b6e95. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/QMRSZ2302819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a15dfa76025f38663267ada730d54d506e19b3094b3f5b57b01fb1635f99420. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QMDA72225839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef97f375869a7993794ecfbe7ad44f053a0b4848880ebf13f88b2e00f8d288f3. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QMDA72220562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ba13f5b40c814d9398e114b59ce108d46a37369677f1ecb1bcf3e474faab20. 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/US83Z2018337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1f7ef571f935485cda962257d3cd94339082fed9b26593b5f66f4d2e0bd5868. 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/DES562210415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc523c97d579871a27664240a4c0952687c12348a961a85a4500646ddedee7c44. 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/DEA719901522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc46f8477375986817d9635a26989be62af8f9fffd467fe6f8a271dd45fa2f443. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEA710203780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x683d36317c1678867cc1fe4411aa9d19bf7b959dce8b13702b8e9007d2c703ae. 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/DEA710409660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe80e1b0d4f326b743952f6837bd39860f227a9b4779b4398f6de274416c0da04. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEA710409670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc076840ff59d9e4ce8886fdb469c76082f8d97b0e17f632623d90ea0a39792b7. 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/DEA710409680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x493f40492f9d97516168b6a042cf44a4987a92f30d7e99aad4c16c97f0dcd59a. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DEA711002090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x813f6266d89f83d75a05eeb835658f2f989e6094350cff1782e562f29dd598fd. 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/DEA711002180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd0a79f822727f3ca82482766195ec0b56fb89a290436cc71645de6b26d30c7b. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/DEA711002150.
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 0xd45d9d921115e9559a6e9aa9ee9ce19fd92f76064ab0b8a42a1cd2d9a95efee5. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/DEA711002080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09a6b54ee2cbdfb5b354dd94a0ccab7c03d2a2af298072a3bd8e767b40e80973. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/DEA711002100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6311014ef9d15649f88777b85c1ba8554ddd4b8f9e43da3ad8aead505027532a. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/DEA711002110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8c47d0d395b0423efacb11312a4319561a768133a4913b0155a6d392ba98015. 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/DEA711002120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x071a3d35aac3ad70bf76466229018863e008a253fc636df77b4ab8f0b975c2e5. 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/DEA711002130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0c186cdae2fb15a238cfdf7cd547c1d2dac8a3d6138c5ddc93fac972a25de13. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/DEA711002140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b960d5dca0d842dfb3a87b05eda9a88ef16a95528db7df275949a2f413fc2e. 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/DEA711002170.