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 0xcdb795bbb4a27b471d27556fa2d544f258248afaf4572fb1b0857175b038f34c. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/859ef2d0-c41d-46e4-8dec-cec249eff408.json and https://artists.proofprofile.net/proofs/artist/859ef2d0-c41d-46e4-8dec-cec249eff408.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 0x7e32a4ab85b268d7cfc044b9b5ae0198d349e55bf344ee6ea680904776dc54fb. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/USMEX1100016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6941727ce1566f780c172064871ed999579b9f93645f92ce71cdce8ac212a271. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T09:45:00Z), 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/USMEX1100017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1044c2970dd5fd67b0f5ed5fd48f91634e42ff6c849cb3cf800cddb5209e1734. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:25:20Z), 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/CABM51110106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb58052416e41523b662336b363f4d20fa7b3765376c19c995cf320d71d81b19. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T00:35:04Z), 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/USVCE1200009.