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 0x9285b9def5d15697871c26419cab6c70e0d2312da5aa5ba6859d565ca146fab1. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/33567402-cb8c-43ca-9324-c109efb26990.json and https://artists.proofprofile.net/proofs/artist/33567402-cb8c-43ca-9324-c109efb26990.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 0xd9ae89eade53b8ef1b71a2407311743633d2739f3beaffc2e24a45f64d2d65a8. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:52:34Z), 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/QZMHK2572325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b65bac2bbae4d303ba00f59cdcbdb09435820b3daec374bfa210e4733d5026d. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:58:20Z), 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/QM42K2574117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe59d63ccebe95dd63c85b8c301a46930e493f76019dc908dd5734a04389f389. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-19T23:53:29Z), 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/QZMHL2530698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc34f58ad6d8b64506563f5df3eeb714210b55367019a21725fbec9546994b68e. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QM42K2531367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bdbf2737dd83f58fc374d431f6ce42fbb88fb8148679f99a007d93217b65d22. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:10:57Z), 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/QZMHM2550695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7c61e53ac78cb6d035a020cece11bb68a67788b2cc5310349da3cdcb7cd875b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZS632531432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d6d15bbbe8928e693925769a62365864468f920c5d7671efee308338d781bfa. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZMHM2517920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe96c358fd02f50538f87782895809f10eee224f12e7dc9f8b31f800943f2d768. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZMHM2542881.