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 0x243299247eaa128d1b5cace1c543ca9276389da56f721094fda0233dc445b372. Chain 2 (Bitcoin): anchored in block 953907 (2026-06-16T07:39:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/153055cd-b6f9-457f-bbea-f2cd8ea1854c.json and https://artists.proofprofile.net/proofs/artist/153055cd-b6f9-457f-bbea-f2cd8ea1854c.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 0x4322164c7356c668c1880b3ccb3d051e0759549bfa23f9f07ac81ba8984f092a. 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/GBKQU2520826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae032edc88dd7d92dd419d0d419d7c2cf2dbd577f8da1a7b3a5e33876c867bf7. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:18:17Z), 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/GBKQU2520827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe14cfe58f5060e328dfc28b505b6b069df1b2c4988569bd6c0de7a59218a6caf. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:30:49Z), 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/QZG2X2419017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a0461e583350caf97d0830e5de53b55d696c7900ef15fe864ce17744136a391. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:56:29Z), 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/GBZDL2501698.