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 0x067332bd610589edb3e85249ffcb6e86dece2c488d7204dcdcfe03cedcbf0997. 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/05d23b70-8f69-4d41-9f91-3ee944177c45.json and https://artists.proofprofile.net/proofs/artist/05d23b70-8f69-4d41-9f91-3ee944177c45.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 0x8ff5f57f7e02a1d14eee4279240ef12ce27e5f6358aaa97afcdcb104d8a1ada7. 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/QZMHN2054036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef994657cfdb2575b386aafa9cba7a05698ba291fa667c64a57337368c02e830. 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/QZKDK2135597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x850edbaa6c322aabe81d44a8bea38b4f1942344e854db38c1cdb2e89d1332097. 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/QZS672135445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ba39941c069f1bfd001d2f7e21d8361c2c9920dc16aa9374193b131b4d7e9ae. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/QZKDK2219284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf8f3dd5cf97545d1a9d974890d87faa9be5038d8ba6b70347b407cba805f960. 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/QM42K2260092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a7707f050ed0eb65b4eaa9f0b3ee5720c1afe56751ed5d81072fb60311d07e. 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/QZMHM2214407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cf7c8618d430a3225399ae385d864121bd2fcac9ac1159d04966d4025bd4f60. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/USLD91751562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd17b03415317bc1c2ef773cd78ccf6c7dccf74b3b560b0c1719462a44817e6cc. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/QZS662291676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x014341c8e05f72f69a86dd8454867bd3605dda84e10fcb519c42b4d810899422. 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/QZMHN2258286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95d9440b2bcbd5b908de6f2f24af839a8896c05ed0d9aa4bc1ee4c138e0aa922. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/QZMHN2258552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x404c7ea1e22dd66acd76404729a277d405ea077f2a06f865df6e255fe6121ce1. 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/QZS652206553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf439714bcfa7bfc8d959be52cc10545fb2946246de173da6f44a067f9388d34. 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/QZS662240816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9286a314c5c2a30a3942c5e91b8e91fbd9e5ac642830e39c59549bdc50e4b05b. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QM42K2345049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcabf5ef1d7aa70532ee159b2ad8b6a5c892314316d6e35531e7b09da041ddc6. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/QZS632366974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f74d7e81e0385d510257c563a05073d86a976e16ffc0cffcdefd37c4caf7e8b. Chain 2 (Bitcoin): anchored in block 958656 (2026-07-19T04:04:08Z), 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/QZMHL2369126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97b060ca27486c03f99fc8257c9bbc154c990c118ea8a08613851a92b026a1d3. 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/QZS652398001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85b13adc97e82e93672a09b66ed70a682a907acc557464de357319938b248523. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZMHK2348412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7c867f12ab53c4f31f6eab0b457e02379a5f14aed4ee38e702cc829afc80d1b. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/USLD91751564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa67971244c47284e7544f3e8326e7ad938b585fdbc0515c81eb8325893a0b9c4. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZS632389649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01699a6c5967ed5512099f3f5fe80656a874b2ca4de6a89e356aa4891356f551. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/QZS652375403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x673f3cba97bd60f7effb559632fd9f507891877843a14bd977525696e42942d5. 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/USLD91753377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9ca474334bc1a9de1c2a642934d31aedb13e990c962fb14a5ccebbb85961f11. 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/USLD91753378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x108ab66202a4458ef49c7c20ee08ed7693d78d897f24784627d9cb5601309ce1. Chain 2 (Bitcoin): anchored in block 959063 (2026-07-21T21:45:32Z), 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/USLD91754157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe87f5bbb9a7dcfab5d1989b89f7cbbf1927d7f56421732fccea300989dbaebec. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/USLD91755607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa094c7cc9a4674ca653d9ce78c653017e0c526608eddc1bb05968335fbdff102. 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/USLD91755786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e8e039cfcfaff7db8df601156426d38b96a4d5884cd6b14d55c8eba536ac025. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/USLD91756142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1838aace6e69f5a38aad96234c037cfbb8963ca1229074f48e97a0589083067d. 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/USLD91756339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6517585808acd26f1b3b1a6b9f1bb41ee14a89de2441371448f8adb94ac434b. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/USLD91759141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfaebabcc1fd4cd665537f1316df721816921e0292fdc68355f44ccfa9fe157d. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/USLD91759144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8327e3a34b405883d9ef30ac78c30e87b1c54af207b48c5efdf14344ec930b7. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/USLD91759145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdecae18ef15d46459f12bf9fc75ac01955e41b35a54fd39fddff8fa6388e210a. 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/USLD91759146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x876bcbb64b3966847df6ac39d7087dab719c9407a18f5561074f846b3f7ec83f. 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/USLD91761367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x223dbe1299411585c79dfbc3a4246387aa6ab7677d55d83a8ed483e12b60a77a. 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/USLD91762069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb5b922ca8fc671baf93c324b50b33053b0ab7852687762d45af95380028e62. 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/USLD91763119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c16dee4ca69fe0a06953e24d116a733251a113f87901e587d9822e309ae594e. 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/USLD91763676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd02be61692bf5944904e2fd62985329c239c8084a48f0343c588977046359034. 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/USLD91764600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eb1e4bb30a598915f370f9da23a0492a151f804f97ac85f0f2f4b1b907c03d0. 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/USLD91768274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94a8a1df45f255c05b4e3a9a24eee3c1b0f8ae51f34f3f6be2576e7c3b8bbc42. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/USLD91768558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33fa30aeb01d20209ddc72e35a89aa49a72fe6c24384ac9459607cf6c7544272. 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/QZDA72597092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6064bcd3487f7bc094aaa8f883d3c7522e29a2945dfa3b4d243ccb8974346fd. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZES62596828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdf7f86c4039c763c669467b2e75c9997b2f7e259cf2ea6f23b6e772a5467036. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZNWY2551320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc29aa7c5b8f48822a945f29f5dec5eb2c780876f78ac1d4976caae29959baa86. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZTAY2585134.