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 0x2ac00f5cb41566fd82c90aa7c0f439ff0ebfd16944c37b7049c52549f0712c1e. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6eaa5f68-b8ad-408c-8c50-4cb707f3199f.json and https://artists.proofprofile.net/proofs/artist/6eaa5f68-b8ad-408c-8c50-4cb707f3199f.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 0x69ddd2202aa89e1ce523c5ad04ea2da8fa303eb5701d955335294f71231ad867. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZTB52539954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f62c9b041fbd1e81c2867088832fa3232af7522828f8ef7260ba0d14d4ba6e2. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:04:46Z), 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/QZTAW2514085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f30d6f654eb3b5cf5a6591a67012ddb05101fbebce1f6b6de4de8aa73a8cde. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:35:00Z), 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/QZZ7P2540699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfa03a115dde849cde7c18c617091726b078074e50955031fa94b5164eb896d2. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZZ7T2516075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6374be73eada90d56bb239ef4073cc36980548e582ae84a17c1005a2be147d9. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZZ7U2521952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07c6fd3b346d593857b78fd6f7ad5cb77ca9495d4bc0bdfdad5530a55fe4a6db. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZZ7U2570139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95acb1ec6a832244ec88d6155ab67580e7101ef4aab44d0658dd36ce77f8442a. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/QT3F32563936.