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 0xbab025f7805604c818139849b4201b99d10b48011d44461addfbdeb8015f469a. 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/a45fbd7b-5698-41d1-9b1d-8624ae79a0df.json and https://artists.proofprofile.net/proofs/artist/a45fbd7b-5698-41d1-9b1d-8624ae79a0df.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 0xd73b3719cd215ddb587815fa4e02e90c63ecc669a4e9fa008438ef81605a20fb. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/GB8KE2205399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ff3ac2015c583005e7b163e879f700317324609326993294daa0954fb51a30b. 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/GBRKQ2337865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd5f8e87f188e63591f5adef70227de600cefc5724634b0225b862f31055d297. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/CA5KR2377812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f2e4f441ea2e7313dc35fd6501f937115ae732342d9112a6901c45d1359f809. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZZEB2370404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d373c278b0fc0448d87ce4d00ba3e26731083ed2899034f2114a8c0ccadde8. 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/QZZEB2371098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5256839f676284678b69138f82798baf7f1d0531aae7f3d008a5b0bf02369a01. 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/QZZEB2371102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf00279bb502e9e09cb4b267b48a4558c9e26856140d08cf6bf45d065cee21eeb. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/AUMEV2446890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d466c0fda7ea6fb92276e050fa3dd8f92b89eea1c3f38f44257446a4c91da6d. 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/TCAID2473087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bdea884bbb433aa5603a0ccad1706bcee651e5ca9a1bbbdfd5e4e9b727a4f75. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/TCAID2473090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x419bf5cda036d4ee3f3093be60b2dc2b45902cb3e4b1e68358305a9be33ec84f. 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/TCAID2473093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x996a020626f5543907b151e96ec8d2ff0db94adab5df7476aef6546d44a41b57. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/TCAID2473107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e254f5db83b65f96f3aecd920eefca0e6ca95ec0119ff43a9b94509c28cd54. Chain 2 (Bitcoin): anchored in block 957526 (2026-07-11T06:03:28Z), 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/QZMHK2412681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97665f4ad50c80bc647c26e2d19bd3a0783fea62fa55a713294099f5991d3767. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZZ7M2491207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36437679866a0961151ac8843525d7683ed729d26c478169ee6ba7cfbbc8b2b9. 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/QZFZ32505707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f3154ca170f5a75783ed1f786579f04888d17f15ea9107b3b7a1a8d4b10cc6. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/QZHNA2511091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc864abafcbbec3eeb5864ba5ee0a7a4074b5f23eacc278a447a4e2e724a4877. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZHNA2549774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1070fa2c536675ecfc9ba4abd2a70e22f83dcd0437d02362af156e25e6bafeb2. 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/QZHNA2549776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab244efea7d51df230352352135acfef92439b87c73a136be36fbf4da5332ed5. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/QZHNA2549777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8b1b354fd99c50a249553a95ac9cbfb20500ab42cab87ade1bd2b93d13fb6ea. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/TCAJM2512861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd03c9eda70a200a73e8e3cda57af518eb7914c1625b5ed82d6ebd405c166ae9. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/TCAJM2512871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4430875c57ab1e5c68bcc77a0128bd88cad96f7fe27b7de10dea14ae1f392bb2. 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/TCAJM2512895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd65a404f48c1b5f53a47bac45c81022bf64bc04f0e4d9bd8ef9a9af18c1ac644. 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/TCAJM2512907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8af631f85ab424126ee1196bc872dc7f2fa3b8b442acbb26843ba954d8ccd12. 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/TCAJM2512923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25ed428f0ff65fefd56d886775de7c54aff2895a39140dd457912739271a5d19. 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/QZNWT2592382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01cb1319d487cebc3d0c586f4f95ad7e445d774b354263919d81c14f50af900b. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/QZNWT2592383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf16fe819a28a8b3ea1f66ce163f3e2e3e154817332c5896a9e052b7c396569dd. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/QZNWT2592384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0297a3fe27add2b39d572e9525c0a839c9edda482c91d641c803457a0d6f947d. 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/QZNWT2592385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8acf916e8ed83700a5f9d1625c9cb030d2792bc2e644a0a7f62d4111d8ec8369. 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/QZNWT2592388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3d128d07e7abcc69f59e5579be34e27b1be131fff38da5fa881f1acc13c6944. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/QZNWT2592393.