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 0x1c4bd7b05667ef0f82c10b08738c401c3360bd07147c171ef783cc89cffe948c. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6471b3dd-786e-4f11-9e9f-db41ad88d501.json and https://artists.proofprofile.net/proofs/artist/6471b3dd-786e-4f11-9e9f-db41ad88d501.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 0xee02cc2946a1b5551963b1a435c8e56adbd48fd743bbf3d38432e1f3f58e9fb2. 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/QZVEM2315910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3970fee7d816887eec2499f733099b54e055794c37a52f92fddc6ddf1585f16d. 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/QZVEM2315911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5e13bb542271f06e804c86c1e298b83058d0c218786f9c61a2c37464b412a9f. 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/QZVEM2351826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc14fc319ebf98abb2e2db762eaaf5922638dbfbccae7c5f9e9dce2614795d8a1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZVEM2351821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fdff0d189c0265c7766cbbb3b9beaeaaa6804effc3a0d8e549e2043de86b5d4. 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/QZVEM2351831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f7eccfe7a79686f8dffe32694a7d263e04ae7d9e5394afdb3c1160fcb7ac3ec. 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/QZVEM2351839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27c03dd3232ea4e5af9c029c116a0e6c934d140081cd42f6c8cfb5f5de8cb545. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/QZVEM2351829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66df0ab58f8600dbf5c33598fe34aa1d86549be292115e19672d8c2c552b80c4. 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/QZVEM2351828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x971d01659f6ae1ee81681c57883c674986053928ca784b9b6ed222f150adf09d. 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/QZVEM2351827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde5cd8095bdcfd2423ff5a5ea35c94f1c011e59386613951260bc1da91d99110. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QZVEM2351825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2c0b0375c1a3e654adad1caca93f8aaffd7d6e5408f447f314d1b0333795ed7. 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/QZVEM2351823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c7239536686fa9a4bb92783c722e3a5b306eaabddf2ea6ff44a2e893f130ead. 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/QZVEM2351822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f2700fa9c205bef58aebebded36b6688b9043f3f019b47a948ce5ea311b4c03. 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/QZVEM2351820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce478a8ff7134a8614971f781061f60ab9fa1877c2a10f7f711f2c824dcb4846. 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/QZVEM2351819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40572d0380f7f7fcee61a35a3a6cbb4c718b7c4da36dea774ed325f6507d0a69. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZVEM2351818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08b48d425bcb03a59fd621ecbd5b0019a36cbb702b2181d2c67c6dae2f404b5c. 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/QZVEM2351817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5acbac88aa41893a2c8450d6b25869a23e4aa23b28588548670d43b11d5d9a79. 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/QZVEM2351842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e8e8e16d5e7430cf533c34b7e40a2ada2d8b0661c2858d26578dce4b2fcd30b. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZVEM2351841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b67a744050da3a3a7b981a0c71682894478214b86ed8587652779fae20c61b9. 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/QZVEM2351838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e45f142725dd673f0401e7c17909c8254d3ca06cbfec618e5bf1828b908e4d4. 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/QZVEM2351837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41c2eafe49cb73bd8006673ee5d25d1b38917d04ba777c1f2ec380d1a32b5720. 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/QZVEM2351834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09cde95536f81027528cbdc7fe749f75dc78c703a97c6e5f4da0ce5c0134b748. 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/QZVEM2351833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb21c194073e72a2c7025f51ce29a94344ea8d5daa47aa0a1f1fe8539f0ab4d35. 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/QZVEM2351832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5566f2521c4c0cfd663d2485358c91ffafc3921e85626714efa142ac61e692e. 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/QZWDD2361331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8a7d1ef7c7d5e54731416670d881d13ebb0f5fb1048547468d89df81ceaa58e. 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/QZWDD2361335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e4d62558407601da56d1bb256032912c5516a593ad5709310e5a49f7c8d2388. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/QZWDD2361329.
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 0xbfedf71fa7128a3a066d3b6367e68fff0d53986eaac9948b48b67eb3cde7054d. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/QZWDD2361333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda1f8b23661163ec64b11055bfec76515fcede9c2de9d5e405ed7b2de674f8d1. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZWDD2361338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03ded10b80c087d6059cacf0cf668f7a1ddbf3e4101fcd879144f4613d7e168b. 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/QZK6J2316295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e5d128ddef04d77de21ef56d45e19266dbff1274254e50fa49a1b18bbe51d6f. 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/QZVEM2302461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f6ec13e8e18ffe010f321318652446e83bfea9ab67f18e30143735a4d8b1dca. 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/TLREW2229014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc967156c965a359e50ff1eaba82f40abb1a39734564001774dfd228598e12c2a. 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/TLREW2229015.