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 0x9ca39bb06087387e365be59252c742f8d07a58f6839a9d6604e09e5a649b2610. 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/082bf15d-05fa-4ceb-8982-0382dba7e89a.json and https://artists.proofprofile.net/proofs/artist/082bf15d-05fa-4ceb-8982-0382dba7e89a.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 0xd7dae9f9e256909f5f585ed7f42c412dc14328fefe51a3c8cc7e2f80ac540744. 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/US3Z42000129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33cc1797738beaf6c30f536479ba417ee4cf6136538999327406629540810435. 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/US3Z42000130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7fd359b8d1bbdb147bfb311966d96060eedfb31cc09194f66dca7e603f4690e. 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/US3Z42000132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x549482297950c71c0f6f82ed470805f9e8fdf4001f2039eea6d03ea3ec5094d3. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/US3Z42000133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ed4e0e03f05d0ce251d55c72d1e49c7818d9a047e937f65d91374e4971cffe3. 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/MXF110400613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x232fceb5fa3368b791a6ec306d67ae3e48c89b65fa3e205e6e19e9f42d34aab9. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:45:23Z), 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/US3Z40407804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7c189da4e002f26f4ab333a81204075f83cc7d3b623201e22b7c5e88fb5c7c5. 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/US3Z40407807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2189ad4909927cdddf588a2186d92630222bcf18458b4545e55366acfedbdbc7. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/US3Z40407808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea1fa7bd4637c2bc4a45dafbc1009bcc9be2f83591f68e1654cfd9a9a4bdb9c7. 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/US3Z40407809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde63a01134b58f4061fa588aea6f9cd37cdb60e628d900997f09a878b5964e12. 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/US3Z40407811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64f05f552c81ef99f97a8f213b73c65509c4fd19219b025b9bc2b1886a99b25c. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-22T01:27:34Z), 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/US3Z40407812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7f7fd9a6a7a118927fae0760ab2a11c1e53d20479e6d71acb9f3a621bee279b. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/US3Z42000131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3820cb2536ea4f325047392524b38c5042da66c6a0eac7a19b1c6ecd6fb633ac. 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/US3Z40407916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb0870bc2920ca22ce45e99a00a5d91af02faa0c193f6d0a3cced1ecf331efca. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/US3Z40407917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea2c3d3baaa5c556feef1eadc20fd7e67ea3332021432d565f889a27ee216cd4. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/US3Z40407920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38f14d1f5865f45fea4888b17aa124f017f97635b08ecf88c25fd76564d4faca. 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/TCAEL1998100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf19b20cd58ae251fd960c85f7c5f5f794d41de05767e51eb30a405393e3f7e5f. 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/TCAEL1998282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa33e1908046a5627fde8ff6f1b43a5b011170805e1a8f3679da51faf206c4cac. 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/TCAEU2018064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7ccf671d33ec054ac253fe682d52d1f1688011c1512d5a82d3115412656e31d. 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/TCAEY2042118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d97cea1018cbae459706c60ce8e9cffedcdc5c3448a627af21109033b53e016. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/TCAFI2034271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5a659069004692bf7d68e68b5d736e1940a7b9e191abdfad2767b0a26b25016. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/TCAFI2142976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1e831682181d1f6e75543ebc88b02759162e933425d7d590a4ec72f89dccfad. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/QM4TX2285451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x803df29651d2bf0bda443ff419d6185913d93211284bd13d0ef786943f802950. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T10:33:49Z), 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/QM4TX2285452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc39e6ac0b6a7a8a040191b22816d08bb769615ea1a07ca6822b40afeb451a628. 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/QM4TX2285453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e1ecbeb6d0d35dd35dd0470b9038de7bcf9634cf2c61b8b0083292d6ce0bff0. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QM4TX2285454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf638d96f25b979d17bdade55bb9973887ee870879d6143b3f36e0b66f86af1c0. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T08:32:30Z), 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/QM4TX2285456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e2ec6844cae37e695a962608d2017df79f4e4ecae538d7b46c75d101fe8dd85. 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/QM4TX2285458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa89fad6f845b630fced9593c04f18d1110e09fcfea9ba70259a1fd895931a164. 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/QM6N22295327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2567956dac78de0bf360a4dc63b8df8372ac62aea5555c1ab260562501404ae3. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:24:03Z), 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/TCAJE2596021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cdc0b9c53e5c5db62f6a1095356134dea4195a802628d3d07ffba3d1357c1b1. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAJG2581461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77d555037c313895b4f1d997139a27a9927b92f9877647be92173aa5d12afbae. 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/QMHUY1560677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0321a21293a74d59e214e6b01031f0bc25133f1d563fbf4607ef43d880660730. 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/UKXN22205916.