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 0x3c5e42c1416506d11c137b6f8213861adebb09b04bb36537697da9542eef5224. 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/2614e743-bc03-468f-a8fe-3a29f1add5d8.json and https://artists.proofprofile.net/proofs/artist/2614e743-bc03-468f-a8fe-3a29f1add5d8.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 0xb18596c759d8e513b4c1b4566469e8604ff6cd09afbc72bfcc80c50cd8b6b194. 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/US2IR0100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb70f68abd660cee20c1221d8512aecc3c57d9f1a4837f0cd22e089d29075a9b9. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/US2IR0100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6a43fc37b9a0dd112cb8ed4f4f29f92c4caaee7d6402f492492cb475357524e. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/USUM70501717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa406f24e1e6b167864300b9ad91599ac0e877944c8ee1b73502a00809ced9714. 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/USUR10500299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae00f2353adaa8abbfc51dd769928d4faf75b31116a4a7a8ba442e2c8545d318. 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/USUM70501716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6589d290232f0c9055bfde9ff74abf216486160013668153d1a9a0c4fd4f3919. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/USUR10500295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa27c852e6adbf0455ae8dac7127b4cb15cfc02da2e8454caf225dc737b4c087a. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/USUR10500296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1505713990300e4dc234473d411fa0effde196573056e25d7bb34dcd185c57d. 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/USUM70501721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e30ede1b7c4339da542e127421851754d2dca63d739efb85c4cec57332f032e. 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/USUM70501720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d278a4339cd2573cd7717c0f82989b15cfa17d77b17df33790a6df509277a2d. 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/USUM70501718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dedd88aacebe09435cd47d00bf487cbe12d94bbce3881d858e1cd95d2302ab3. 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/USUM70501715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd85cb45315b88a8c1fbcc36e0400a5c82bc36797fc9bca5730e7c9a1947008c1. 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/USTN11200480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8296d60bad8804b5f7dbf7214d3ecc9a7dd286b6855b214a96ab6635bd8e9c2. 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/USTN11200481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf016e3065c96b8524fb7ee0b38be57cb1bff4e34595393af892e890d80054919. 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/USTN11200487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a160edaf7508ccb2556971e7fc68d727d5663ec5ea94a03b33ecac4e18f10f. 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/USTN11200484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00d3a10bb530e981c40401bdca5d0666f0d7ed1298a575b27f3196cc0e03c9f7. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/USTN11200485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x008980a3f1965ee12123602b8f6548669eca1786b416b6fd5866bdb8c088a6f0. 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/USTN11200486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cdfdb661b7273e58d113d595c5b8cd2c75fd7c3a71b38ecd563a45e725c57c4. 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/USTN11200488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29ca0c97c26ceb538964e49eee09988bbab1a5652af0c1d476dc4889f2608d2a. 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/USTN11200489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x160ff87a85112d2466bb8dcfa1c68e15e73c3559da63ad224cb8e5ada714d25a. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/QMFCG1300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f7fe1bc128a448a787ccdcdaedad589a97cc5d7ecb1f449e6921cbf4913c309. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/QMFCG1300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0156e836f8ff2a61e2120b27531d9525ce86f7a95e646a36dbd0e494eece9798. Chain 2 (Bitcoin): anchored in block 959011 (2026-07-21T13:26:15Z), 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/QMFCG1300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe68906c13496ca5a3470108380492f721b1fe624744821e2ffd3739ce937e3d5. 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/QMFCG1300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bb7dfd70981cd40719194cb4f3a65e7db1e8670387637d8306a3807c3a84265. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QMFCG1300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3135e2764dbc32590a602798f8fe6541bb7b44f52ef5a4bd53dd68cc6f60e89e. 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/QMFCG1300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cab10b89cc40eeee8c8259b795db74e33efb2fb256be579d1bc9a36ac0aff57. 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/QMFCG1300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecf660c11d27c74744d224fe0f2f05caca0dac8f1a0da226071b7bb81b53e932. Chain 2 (Bitcoin): anchored in block 957595 (2026-07-11T18:26:17Z), 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/QMFCG1300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb33537960597669d8453b60113a15b8cbf96393e81a8e9ad19edc338bb347c39. 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/QMFCG1300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6163a472dee3264c36620510687b7d5ef905a0dbb9c561e5c64227f031760093. 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/QMEU32400664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a27caee7baba75345a2b04be6c2ec1aec947118731231af4254092d306fd3c5. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QMEU32400665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddaf23b2f3efb2ded895bd02418a994838c937313457701d8fa8c9648ab59be6. 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/QMEU32400666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7227a201509958cb4644870017a1d6f8d58040c28bb6e593cbbf917aa365c1b. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QMEU32400668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf11688e6f8f3049c38bc9a33996c7aec02f1891697977205872b436d76777e26. 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/QMEU32400669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8b1ea391088d2e5b950a53894a5482f79b470ed4624a7cce21f5c20d0c6aa35. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/QMEU32400667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d8070d7f998a67bbd42ad20b85596fa16991f34346dc62922edd5a04d5c724e. 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/QMEU32400671.