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 0x8d5b81a631898741807398daf41324d81b1a05d6933d4deb656725faed98d73b. 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/451ed6ff-9ad4-48f5-aabe-0dba23dfd6e5.json and https://artists.proofprofile.net/proofs/artist/451ed6ff-9ad4-48f5-aabe-0dba23dfd6e5.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 0xe4f83561d7bd7c59506db8f1842db9089f3b564920f49e5cb9ded2e4c23773da. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:07:17Z), 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/USLZJ1715151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabc48264f7756801c04eaee547eb79462ff73d1d7f1fd95d044d233499a8893d. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:37:36Z), 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/USLZJ1715153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e9d2836d6a4b283cc5bfc9398a853f21009cfeda8ca1c3aa39a4e579826cd38. 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/GBWUL2080143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa00d5a54c05f4e9fc072fdc8e3bc1a74aaf4b41d9aa74d64dd230673ecbf0a2. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:05:32Z), 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/GBWUL2080150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9398a8a44d5d0a794a1ceb9bf03656229ee8fa761f32e0d9223563bf1ad523af. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZZEB2323262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2229939afd9fd3bd68607cbd2339ee5b528ba24ab8f3d0b15291e6945ea8515. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:59:39Z), 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/QZZ8A2496735.