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 0x237729602afca71da192e2014608a908ecbdb5edcb4633aa6604894507d03221. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/358f016c-c205-4f92-9e00-0954dd258458.json and https://artists.proofprofile.net/proofs/artist/358f016c-c205-4f92-9e00-0954dd258458.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 0x3f9e69d82f22a72c6323808bd46ab4b7e8368ad3f610cfa1f60846676122073c. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:23:50Z), 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/QZTBA2235580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f9bbbc504a5272ed197d7e76636940cc6e7be6ce7b16d5af933bb06e20e6ccf. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:34:13Z), 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/QZTBA2270313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d45fc9efd7f7d5e51202468f71236130a5f395ac856e5ef60d608a064f984a8. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QMAAK1743386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26c6a44ce9403754abcef14bb8e91a0d63f32617ce333b0df3bec0ee42b1435d. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T05:48:44Z), 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/QZHN72280578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x549981df633eccbfa2af0d77af665d834e6b85ec0f9ab5d3a92590e6a0465355. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZK6M2351074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8da1e92ef050c2f9270713ef746a505cf1b10047a8ff1005e5aec9468f9d920. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:58:03Z), 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/QZK6M2351079.