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 0x863efb1f72c43c3db7f9f7b3bbee6fc42d4a6a602406e275d4104614c0a6c8c6. 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/3e8cb13a-1dea-4fe8-bc66-1b3a9bff18a9.json and https://artists.proofprofile.net/proofs/artist/3e8cb13a-1dea-4fe8-bc66-1b3a9bff18a9.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 0x4a070eedf57226c24de723158d79648a2423ed2892323283d28d19ef26abe3f6. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:35:00Z), 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/QZTAU2410691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d71ee72e64159c00b6dd1e5011efa1ce82c2195129984e6832a70e5ecfe0ad1. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/QZWFW2487498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27aa3c4c51c71d10b408dd04560c0ff697fba4423fe48bf8486013433db89f89. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T04:51:24Z), 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/QZWFW2487499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4978a2c5ab0ebddd3cf0c594561db7ed45450e124fb34829956020ca0389cc81. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T19:07:35Z), 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/QZWFW2487500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x164daa0355e610a7ac39c9fc1bd7a8ae69317eedbc595cd8925757815284de10. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZNWU2563712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5978c7c76ae50f557574bb1f2138db5108be760cd20947427872102d7a93a57. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/HKG292500178.