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 0x9bf301bfb40ab0979ef930908f65ff6c084e2781c6063c2d744552c4ab964b0b. Chain 2 (Bitcoin): anchored in block 953598 (2026-06-14T06:40:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0c385322-4ff5-4dc1-8db5-0f880306ec53.json and https://artists.proofprofile.net/proofs/artist/0c385322-4ff5-4dc1-8db5-0f880306ec53.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 0xb47fdf1dd57d57b040d4a345f3403df0ee39d300cacd11e13cd8fd877b08ff5d. 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/TCAGG2291268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47365f76842a4ba2f2fbd8dcacb27b4d1dff13b075ccc9aa0a9b23c7f046b8da. 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/TCAGG2291187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81691315847f7bc423fe90f8b9576293b744d1c5ce34dbbb49a3722b69d50bd7. 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/TCAGG2291215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70a945252327783ae51b84ca585e28802ece932e904736106026ee6d8e2a3475. 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/TCAGG2291201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb15ea19177ff883ffcead8bfb5f6d2aa254458e0528de230b2e652265cdc8cad. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAGG2291282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ee0e7422dd1877998190e7c4627f2ed6295909a44de828ed8fb90fd1c664ce. 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/TCAGG2291192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55a82956585370c38644c653cba05c42b9c64131605f60798fbb4b14e5c6fb2a. 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/TCAGG2291257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a3ea363d14adc8bd7059ad15bd27f6151e738cc33cd25ceba2fc43665602143. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/TCAGG2291289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5262d14c926229b89f8165f824c8500ae4c7678e8465ed52136e4c9ad8b37aca. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/TCAGG2281813.
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 0x73d5a540cc1a37018f840c948982db004aac44d51013cc58714e320d10ea4857. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/TCAGG2291275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x439ede2d0418535672817eb298f60932092900a3a6737c423308bad05e39fb53. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/TCAGG2291261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5bb15be2337acb9323007a572a991a24100ef4fe292c07be7df1e12cde20d80. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/TCAGG2291270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cef52400fb33fed0b010a505c83f357422c5a7985c66f5081baa06081fedde2. 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/TCADN1852054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x623e661d36144f8a3490fc6cd233178c87931c4320164014f1bb4eb17426d7be. 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/TCADN1852057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d92b15735da1d23f5cbc49bfc3c062876917f659b0179fd63e76543c06deef. 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/TCADN1852058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ae88b3bff9230a23af0e07529cca504e93b18e9aa8bcd2aaf1933eb74a95c11. 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/TCADN1852061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x682e1fff6f32c0e1c37196b7da473b9b96efc43161f4293f9913a86c072f3464. 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/TCADN1852064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x193716ac85b11ec79ad3f47c415d6bb1cbb516b5e6d2386b67fd24f1b7b77a3d. 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/TCADN1852067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4f92b9df992a93556916cfd5947e7727020b85804bc604fbcafcf362bbe7d82. 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/TCADN1852071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d08bc6f2f571320690124cec3f73ab1c5a7b8522f3916585a319317d99938f9. 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/TCADN1852055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaf8e8622ad35928bdeea09a844b75f583eaab80464fc11578b6e085a536ee84. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/TCADN1852060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x501de83d25460413dfd113195398ffe47a907c88c9edd0b40dc4ccf59095ac97. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/TCADN1852065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x431ac0ce7719acd07c6c1e1169b555fa07b80d0de32d8b48817088b0025af847. 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/TCADJ1767056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5a2770f96d5f7c03a34ec424aa7dc89acd6fcef20d654345c398bdd2eb4d0b1. 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/TCADJ1767058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41b5725278fd3cc92fd269c8872055d2242e75bbb8ea54b1753e4582234fc36d. 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/TCADJ1767059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e388d585546564e98387c6806cace90c6d3fa669cbd1875d7580f17e57c5dd. 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/TCADJ1767060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d0c939cd061f8329154b50ccae86d2471f94c80c7a949d8d7fba59ce6c787e5. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:47:20Z), 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/TCADJ1767053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x620440aa0a5bad7ada913a25dd3d0ce7ac15ebfe5f3693b7d15859de58895100. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/TCADJ1767051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4864c0e3242e11f9007f87a47e7b4a7183dbfae8446ddf1d8030f4a5ef7b6502. 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/TCAGX2365654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64eaa85414f8c4b4fa74929dc81753e01d2154bfd969fa6b367a35458b3b51c5. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/TCAGX2365678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x234671487d65b0f883ecdba0fe60b6c06a62b6368d7a04161bee14dccced35b6. 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/TCAGX2365299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7963424a8edd9851f40b413cb871dc00c777580e7320ecbd34701f8c44edd0fc. 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/TCAGX2365301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe43e17a061d302ee3f326d0035ee7d26dc860a61f485334feae044379ebfc08d. 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/TCAGX2365305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x735b8e8b233a83b7039d51d3fb92d36fa1041d843fa3257976d814ce50dea9e9. 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/TCAGX2365312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23cefbc77dfbda96727c38b592e98aba89246f6eb7de528687d45390f5b15026. 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/TCAGX2365320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde28d2346fe2da9541b2aa4d4d285519ca12d2753967899af20e5298009d8dd. 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/TCAGX2365292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8ff3dfecae62d3ab33d0bf12074ee5085bed6630b7137bc2fa9ab60286155ff. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/TCAGX2365297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd0737beeb859812d2af29b9b5e7d59cb3b9c7c6ec68fb943ceaafccca619377. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/TCAGX2365308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcff27064bac734229bf573fa0789337d4b3843f7dd97fe3aec746f58fbc22a3. 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/TCAGX2365309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b16425f19d0b0c066bde758343b7c271e82018d69e2709281653af982807d60. 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/TCAGQ2222889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e68cb8e1ac1e69cb52a841968748efe6f117137c645ed3cf18b80e1b78348f8. 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/TCAGQ2222890.