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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa9d373d9c8a3a10dce9645b4aabc50f9b793641aea5faa577f71e9d0f57879. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/06de6f93-d3c8-4cd1-a296-85b4d67839ac.json and https://artists.proofprofile.net/proofs/artist/06de6f93-d3c8-4cd1-a296-85b4d67839ac.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x731313d7032ddbe1e47d86fb25a4455de3c76679a9b39fb3e5d0db2252558f63. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USDY42031642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f439003cc5fba6f41ba72b8d27d5f5e87c1fc92f6f188714878559251e7a88d. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USDY42031645.
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 0xa7baef6f58686063c5afed3f9d1fd6a2b957eab21125e88bf581447b213f6ab0. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USDY42031647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc6a291d39c0b9c6487a58df2df43d902ea02b358950fb6a848312e38e620b41. 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/USCGJ2114312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a21e378b70e72c839b6758b2e0a207b1258459638968ba0f29edee630ea5ac0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USCGJ2346723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddf55ff59e478216386b5b6b5a8b15c4b71cc2a0b36cbad24dd4d9bd7ec2c858. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USCGJ2346725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x234c02a59ff29e1883f3a75c965cd5a1591973e8277455b6acfade602d041d2f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USCGJ2346726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2af06ac70c97dd91a13dd4beebfca69d08ee7d118d2e2caf76ab55edf4ba47f8. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USCGJ2346733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2dc6873b3a036ff0bff33e24a96dc124f24415066f2d94caf3ffdca914b73ab. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USCGJ2346742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x419e795bb6b23b99d1a5f34aa04a7c4583e13eaad8a036857fbe6c6d0a88311e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USHM81922399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x456cb227136607fc4e4ccc7b40cd01ab13504d67caf687fce9f7077c406df27e. 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/USHM81922407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99e83e3491e60c638de95ad28a2451abcf5439f174887bafdaedf3f1a4bb296f. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USHM81922393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda5419842665864e4ff8492805284006348c9ea3e667ad466a79a0d288f5772e. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/USHM81922394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78b145f253be86d85a05d655119ea1708b4adcbd4801b8160f199562ce3c67c8. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USHM81922395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9385ab50f5a6d668c90a6195fcb10a1dfd859fb049b6daa3eccaae8a9e76a07. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/USHM81922396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8371849d829e9b103bed8956876a85e699d10a2d8c59b356d22e0f431d14078f. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/USHM81922397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b84d31ff9c721fee82688654a91cd233ede9dcdb64315f80d3f7f3bf5fa3c7c. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USHM81922398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85c37cfe3b70cc82bde129bd1e15287564a6217d697102af7feb8e2bbeaff865. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/USHM81922400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x415808896aec7eb9b8ed9a0bb6162b7f33a37773d22fd335b1483523405ab8b2. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/USHM81922401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd524642c5ea27afd0123bb1db18d42f8d9e3d376bf90596cebffb1f1ff57d6be. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USHM81922402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e1c5a2065aafa331cba42dae46899bf34e510f5ac663deaccfa6a80386839de. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/USHM81922404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09a87a0a759b48bce1c4f3ecbaf8f86a092b076038ad2f7af8be660820c68e4e. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/USHM81922405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb386b02dbf6a46cf8c675ee4d991f3b229cafa37477feb5db1198086223d91. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/USHM81922408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d7a32b6b06b4be8248386827ba886655d7e6e7dd5289e65916b2a8a4fe889f0. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USDY42358485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c544a4962c4e0c711f7a4b83d964aad0b1ea99eded9f4edcac8759c3a6716e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GX8KD2263973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e8ba0be4d54067f719a182834ed39c154f26bb84d5b6edf2f4d7f5f1ae19c18. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USL4Q2224460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd9d8e1502eb30ee0a5b2bdb88f84fa392f88aade440cb968bbd500090c27c2d. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/USCGJ2203709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aaf3bfb896f1bed13513c7d8ad9a4496f096b9816dd37d4ef23eb17167db5c8. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USHM92118944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2b00668dc00e8680e87b8435e446ff4bd213c72a64015f42ef7454974f82205. 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/USL4Q2096430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c2b407b5ac0ffa0f52f8728de700502821b819b9717fd6a05207c562c86370f. 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/USHM91981521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae4f5bed603df53fb42f736f187907d9f2926c39bfe9e09e9c9d09cfc4a3ec91. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USL4R2147508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a6282e535e82593573be16a041322955ee0ca40fccf4a1ece44c9b06f1c33fa. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USL4R2147513.