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 0xcfeedc396e88320cc5fa1c65848a3b05d80d99b1230a34fdebbfb06aeef5f91f. 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/afab6d8e-2ead-47ff-9408-99415824b338.json and https://artists.proofprofile.net/proofs/artist/afab6d8e-2ead-47ff-9408-99415824b338.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 0x7ed591ae553f7193c13963e68b5bd8332058fac85abbf13a0541790092497587. 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/QZFYZ2302934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x227ea4e2a48991a70d9ff23b699d663452151dead2dbc454c72e118ad543888b. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZFYZ2302935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcd331f47bc627f9c71053e707d502747b98e6540338ce89a0ea799801aa2113. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QZFYZ2302940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5f47e654df5cf51d7cb230e207ca553dfecf6f604f58ed85fb4743a77f44131. 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/QZFYZ2302943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2937322fcdd8899cea9c7faee539c4bc821067651ae4ffaef2a011908d52a504. 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/QZFYZ2302949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7680e919b7749865d2cdf3f82af49816472ff06efd90a2d247aa1b09da75fb4. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/QZFYZ2336478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x128c17b4d5eede65114b7509a795dfda59a326b5068ad07141dd39d98c7df144. 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/QZFYZ2336480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cf3dbe8c684ca7c399815c9dfa898183eeaf843363c238621e617b7b0fc20aa. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/QZFYZ2336488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8318fb04c9dd4cd1fec11f73045615e2cd1c0fd7abcb8a1d8d1d218a57c43002. 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/QZHN62188253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c98269d2f31bf4a826f4e717761a228be714c80461bdaecde76ceaa75d10ce2. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/QZFYZ2339051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce6ceef9fc8ef62eb64a5c8d7df837757cf6f64d68baa2440a53c8a9ad66148b. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QZFYZ2339052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01dbe270dbd6c7b95fee987040b9a86e8d5763d5854af479188316c4e1bc6c6f. 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/QZFYZ2339053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb663c116f3512864e82f37eba46346b39ccc625446e292b7697060ac2ca44811. 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/QZFYZ2339054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x508358dc9cd7ff08c5a5bd917e9bd5df4bfcb8a25134209e9a68f22243442c00. 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/QZFYZ2339055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x421da7546e802e32de123991e749c34cd2a00e313d38c9960bb42df19d32e09b. 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/QZFYZ2339058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x374f287d2cadf536ce8a8369c3ffd544832ecaab3b0259d09724edbfdc0b3608. 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/QZFYZ2339059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7080fec7d064ea2ddf4fcebe38cc339305e4540fc2bebfdc907a5eb7f7d57bf. 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/QZFYZ2339060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf08165d0707bb49b95d7f00cbd6c181afefa1a07bb53775241093ff904dddeb5. 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/QZFYZ2339063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cbd43907cacbb8c8458d49f47993f9b65e9ed8e7190859131c196dd92c723af. 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/QZFYZ2339064.
Dej Si Pivko, Dej Mi Číslo (bonus track)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcd31081c07401d14dcae1c72a9c3e41813bf8882af304c9ec1855ad6dcf3142. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/QZFYZ2339067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbae3c7c7f1455eb3fadaee0843abcef10cbe3c006238f309e8603e38223bfc9e. 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/QZFYZ2349244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x901d486a43304df76df4e8ca633dfa6d28353ee29ceeba187b271d83066107d5. 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/QZFYZ2349245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c1e909cd29efc2b218c8418632f369e9e0d80c356c67f940090a4b5e6b1043a. 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/QZFYZ2349247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2899f63ff44aea1df4cbbaf256a7ea257dc73d24fa5d59f86638735d18e36e02. Chain 2 (Bitcoin): anchored in block 958143 (2026-07-15T10:15:04Z), 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/QZFYZ2349250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ee422b869ba753546292078fdf11372838d11f3869eb98b3fdb1806f9f31a1a. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZFYZ2349255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca3a96f0fde5f91c68b2846a5289bcd51f28b257faa509d911df1a1afd39e61e. 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/QZNWY2185092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70c9100f81cf39c44b61c8386dbc27f507cbbc7cfd6a6a737255d113cb59dd67. 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/QZK6P2305242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc62b5f74aa33883bc12983e36b1af6bbabd8b184c97f620bf13352fe591fbd46. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZHNC2495484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73a4925e7991398093c03d7c09abafe4cad8200fc778daeac418289eb5e8c464. 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/QZHNC2495485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8471b470d0422ce6bc8b76e5bb25711fbbac4362f52196bac7fe485f3d7668f8. 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/QZHNC2495487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc34b3d10e56e7febaecfc071bbfa9e738de0889056364ce46b4668a09c879e48. 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/QZHNC2495488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73e1af995df8a48c57cc529cfae4ca059c3059dca5f5d9829f572ad991dea94b. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZHNC2495489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x002c0198b5c987b1058eb9fafc337032dc73bf3e76d3a7e2966bde037f57e482. 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/QZHNC2495490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac6da99d86350caccdd3189b04bf54dfaec01dd3de9ee96f2acc1607b332e293. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/QZHNC2495491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f21ddba96d70dce7e9fff9d7917e43724fabc2a5a8138af38aa11076fc4dbb0. 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/QZHNC2495492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51e1fa79c5a536edefadaf3e9d2b9c07d0b18ae58c3c2cd413d0f0d960f5dbc4. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZHNC2495493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0bbde4368e4f47316e817bb5386117d01543690d96f2b629c1c74006ceb64e4. 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/QZHNC2495495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bfad397bc6c30bb18f8cf8b69240a78249e7b22b962cb075b3927d3d0f72222. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QT3F22516073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b4798428dbad2ea7d7214a3f40efd9c4c06ad5a5ed98c064986d0254583304e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USHM81686432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa36bb1a5f66ce2fab8b2dc17df87154fd3350e3faa7332ea5358a07a241fa555. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZFZ72085766.