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 0xbf682a7813bebb9db17ea40a076966f77c6dd1bafd0781bede493a39eadd0281. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e695a14d-6c34-473a-8b2a-04289cd4cb94.json and https://artists.proofprofile.net/proofs/artist/e695a14d-6c34-473a-8b2a-04289cd4cb94.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 0xddd9a28495459d2ba23cd065f849dc6e6d17f30e962476d2cdf417ea16a58d42. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZMHP2377404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53ea61fe101fe7d09c2f17089054beff23cfb44438cd3be160e7428bb90b2011. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZS632337712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04d1199bcf45bff23588cc9959e9de085dac2f72c99cbbf2bc96d4bc525a14af. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:14:27Z), 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/QZS652300107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3be318c85a941a422bd48a4d3c2ce3b3c4697d3113276fa68c45c86ba3395fc2. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZS632340289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaded2db13fd33baa2542ba3a24b8482a8e58b5d2540f6fcc639e297c2cedf5c. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:59:16Z), 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/QZS642392493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc1bb67ec7f4b4eafe3de28f6fedb79fbf734d545bdee82099fb137596d36ccd. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZMHP2391731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35512a829eff368aae5db0561fecc6a9d873533f5ad4bf92a7df0ebf986f4c07. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZS652341054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb47b7f2e078c007a6df7ed616fcb8d3324fa1d0c43b5a917200c5e836617721. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/QM42K2341091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf9a75933704ed499515087f2ef481c63b1f48f6f198ad3eeb49ef76b164845c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZS652336516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e95496f79e4ea191b998f7f1be08d30ccbd410bd0619a19aee9d151bc618f4d. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T16:03:23Z), 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/QZMHL2348516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1349b14497f3662f5dd68c7d68099dbf6613a961515ee4b9b23e633e2b1a8216. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZMHK2332546.