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 0xa7b4e8ea1e086fffa294d58a24d1ec380b2c495e71eb7b91738f91cc858da485. 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/b3242995-3375-43f6-85fe-27a56e8ad7bd.json and https://artists.proofprofile.net/proofs/artist/b3242995-3375-43f6-85fe-27a56e8ad7bd.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 0x3d791510eb836466ec464ac8d4792093aa1f0acdf9e0f728f047ffe15b70526e. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/DEPT62445002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce3cbb437fc9cc7694f5d5722059ce4484097ca60a89a746a29049d9ae3d8a0f. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T10:09:30Z), 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/DEPT62445005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef80d499e976ab22bcb019286bd2543e9fb1325839efc3d5fdf4a44efd1fd132. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:36:07Z), 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/DEPT62445007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dfaa158dee5e0557e8b0443a5a86e313075a07dd772d0d6f88f2e0d7f2cbf6b. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/DEPT62445008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68ea3c5327073625618a7afe9add24faf1f35c7bb4f5e7480ab13017788ff3c8. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEPT62445011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba0ff9fed2d60586af39ab80962706cad3a5277ff6fc9d91052e40172dedf5a6. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DEPT62445014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cbdf27e8493a9ec5db805d4e8dadad6ea39c6803957df3e2408ca1d886fef1f. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEPT62445017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ab1fe861036ced59027c6299859b672e91d43a86246408893e724af80ff1ed0. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/DEPT62545010.