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 0x3e64889310355670b2741f70ca6af7376bae96292089a483adc42835fd78c733. 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/befe2097-e04f-4b7e-abd2-96a0f912fcbe.json and https://artists.proofprofile.net/proofs/artist/befe2097-e04f-4b7e-abd2-96a0f912fcbe.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 0x2b0dda5ec580b2f003527f6bd0334fb61a8c1bcc7a306eb6c2901b7f2d4d2d21. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/CAENV1943840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ecfe4efe498250c67316d055f3ddccda8d8a7ee1a1723c4773acf0626ca8a35. 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/CAENV1943622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x773529aa335c029328c087c42b528d33f9bbc288864a0691c0eb80a9722ba5b7. 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/CAGOO1960587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b0a8d78bbb5a7610e0d96ff46dc79dd890db1cb2d836625c975c79389f3331e. 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/CAGOO1987146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x363d0a89494ea14937ebf2da9a63d595d3900be87ddeda716dc14f4564be60aa. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/MNA031900036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fbb1d9298b01a140ca9b33a8e091da82d20b9cba0113a92e40e3646a311799d. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/MNA032000032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x723edf41952475ea29f8ce2da9ab3ba06d20dee43aa3e2e4cb4eeb563068f5cd. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/MNA032000046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed14c1cc046e4730f25ef2d8d3778305f379cc1770af914934f0bdd154eb7865. Chain 2 (Bitcoin): anchored in block 957540 (2026-07-11T08:19:50Z), 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/MNA032000135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc41a6c6c7ffb38b9def2b35553c5deec09a43ac38a3d25ccbf3b48f9857f7e4. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/MNA032100068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x429ddd65d147c0949aede9d0eb8f9bd2ab768175cd675b429a79889bb84e8014. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/MNA032200047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5e8dceff89843cee4d899341fec26efbf5c98aeab9a8b8c1099bbe58db33825. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/MNA032200089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec5c13b0b0af487da4dcbba6a5235dba5f800ebfd80186416bc17a359caebca9. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/MNA032300053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6a0402f9e33df6a8ab83b500c0e424061ef118b5b49b5ee4d44591b681a2149. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T16:12:29Z), 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/MNA032300076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x881b98a2dd2de4659a736fc20b97f4cfe5ba539b792af7cd0631b12b537b67ef. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/MNA032300103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e14c65c3612d4bb9fe7e1309de028daa81d50605fce4a15b43dd6b834aa9c8. 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/MNA032300142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x509cd18bdd692dedf6465274a13c987187afcb74f30ca5485b89b8707be89c9c. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/MNA032300195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x482f7c2946bc7990e5a1d0c10ded0ed20a10d2cd2145077bde68135621da5ab6. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/MNA032300243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf14e9e89854e5f7f6e498395ba66ed77fba4d2660379ddbe6da620cbae1b63c3. 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/MNA032300264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fb0c6579e0d1a52de86738c0c9ccb827d5e0789d82ba972a4286fed66292a55. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/MNA032400297.