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 0x3169cd3bf1134574c14c2ed51508f8ef17dc1fc7877a5f0c745a500c129c41c9. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d6299cc2-16f1-47dc-b8c6-438803209e20.json and https://artists.proofprofile.net/proofs/artist/d6299cc2-16f1-47dc-b8c6-438803209e20.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 0x87cf76fbc1e0b09e3aeec6eccb420404ef4426eebadbc3ec8de2f27f59e56eee. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T11:06:12Z), 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/QZRP52279708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x844b594537dd2948724ab3a39df70984cf7b25f48f26c0ddc370cd786ed64c6d. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T04:07:28Z), 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/QZTB92255624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20e012fdc9827cf00287a529e5755c393efc0007288246ffd1c2ac5c3df201d9. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:24:12Z), 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/QZK6L2428249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x557b867d9492a57d24c1437a38a10c93dddc531dc0794187e010c3d391590c32. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:32:00Z), 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/QZMER2494924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cbdf419eb7b872cde426da19f1b94d5b550cf5091bc2774992962c514620340. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZTAX2432026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f9e1c09ff9f801e41ee2b2372aa7a0a5cec52d5a5d23733ceb2c8a655baec34. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:31:41Z), 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/QT3EX2425968.