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 0x21e9d4d4408469b82b31aab4903e3e06597213e2684f944ebb153f53bfab66ad. 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/ca9d77df-5aa9-4f45-9a84-787d367d356f.json and https://artists.proofprofile.net/proofs/artist/ca9d77df-5aa9-4f45-9a84-787d367d356f.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 0x79706ad9c2ff304c3f2a73c31acdf8fe5e5a62e57f42b6636432db505e688b08. 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/DK5C50138840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccaaf659c98ab706c142c0eed25adbff0203ffd24ce7a86b3d8a524546ff54c3. 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/DK5C50138843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bbc6a35c8965a717318c9ea869a957ed3923ebe9e851d81268d97222633be48. 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/DK5C50138844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe10fae8d3f5122ee34aab7b978a5053cb9060e95abb29cc1ac58bb84fda99ad4. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/DK5C50138846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f62c27477594eff7eafe56c19ba369fa03d12bb32dac7cb580ce9229a9b618b. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DK5C50138848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4758490fab2b93e7dbb8963fe9e38793fc37aff28f73cfc599c03391f7a04be6. 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/DK5C50138851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09b17ea3d82362138df0ccd9021ac1da1df16ff18c2aa0b0047a400ac08e8ab9. 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/DK5C50138852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bfbbba206d70e4c67fbc4cd8b4f5cd0491eaa9a1036f18145b080b2b96eb73c. 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/DK5C50138853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec5bf26b8a6006d4cfe8ef46bd08031a48c709570e7c95bd6e6f733718ef9ad9. 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/DK5C50138857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ceca73d010548faf3aced67b322b9e4b7159242ea9f429a8759fb81bfc37195. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/DK5C50138839.
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 0x1c4564a1f36aa2ac980208e34ab4bad2d89a4bef1ac7ad4e668d03735e2916e2. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/DK5C50138841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdabdacabe002b9fe5de3047a99735981c73098f3f21a2939fc4ba299e07ffeda. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DK5C50138842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c1da549583f258930cbbccc9c1239866ae01240928c9a52abf3d874dc737c7d. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/DK5C50138845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46d8cfa54353c9380dd6ad4d6b38c153c6a750fd07315eb44a614878efb2da01. Chain 2 (Bitcoin): anchored in block 960155 (2026-07-29T22:13:32Z), 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/DK5C50138850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee0a06be0462870f7d6b2bb06335414253035e06f6a1b24c0fa98e0fd9051ba0. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/DK5C50138854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8956a1dcd5824de6a396f208d2817dc1d54e63e6a8efe6c9b77fa59c3fb79b30. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/DK5C50138855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f7431f4498eda1ede342ef7578ec89b5bd2c6086db943c8e679586b19a74323. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/DK5C50138856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c6eb5fdbbc4d2511b2603a950e7fdabe349e053d3005af024254ac1174ece0f. 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/DK5C50138797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x032c54bf53e8324343ecebdaa49446642b9b7a7f8d39ec4afaf0ef7acd0ddd3b. 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/DK5C50138798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91a7defda21a5bc92c217d7396bc2bb3b4a575a71a5f92d40d4997052376f254. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DK5C50138799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0150434d5ebd9512386da79131de4ed522a257da0abd0391266ab5f4c944220b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DK5C50138800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeda49541c9124720e2bcce9f37db45cfbe575c8f32cc24938c7fcf6f1b10b150. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DK5C50138801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3a5528a32636f28bb66afcc970dcff2ad20933bfb3712e42079528239b51280. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DK5C50138802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f297b43eb1bc6890c8dc910253eb2958bfd14bf2a0b614aa47b0d26cb2bcd89. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DK5C50138803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89f6db32d966fd259bf98885d3b72f6aa5f0324d4a5cb2dcd1a985ed4f89d84d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DK5C50138804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08fa99cddcead0df243e5680245972c37957256171ad5ab762c55b8310548f6d. 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/DK5C50138805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b96627cca7b256d1fc37fa1cea10631ad9121715b8cbd415c0627d3babddcc. 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/DK5C50138806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5da2210793a8bee36cfd2a57024e34cba7d311340217b641f70d9df11fdaa417. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DK5C50138807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x830f531baf32be0aeb3d1109261b271366729c378ffabe7b005bde17a11e23a9. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DK5C50138808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1cceb7f8229078e34dca23795add8c81866822cd55205c0ecfa6706bc3cfd19. 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/DK5C50138809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5244117471ac528032241a4d63621e6fe964b511251ade51d12a58219739dff. 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/DK5C50138810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1fb2dea3ac6802d3ed1a01c13a90f85f751414079d414e46eb8822189dac1c3. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DK5C50138812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd71056e84ce390533b04044ce9b86712a841a8b33f725bdb672f4cccf62b51bb. 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/DK5C50138813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4214a4ffcd31b8e6905c17f3e02a494c18722ea8818c87ed7ffc9f97173bc96. 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/DK5C50138814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x814890cf1119c85b62ab32d3974e0c67759ff5f4f95f50efdb717e41694c1329. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:26:03Z), 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/DK5C50138811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa80745860c4360ef1887c89158b9c7de62717a4c7b3685fe368bcad48cfd8e59. 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/QZDPF1813166.