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 0xaf382464b978a58beb840e1bf4054e76268007eeb8e03a1e3b025e551866c353. Chain 2 (Bitcoin): anchored in block 953743 (2026-06-15T04:52:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a2507b62-fedf-450f-8de3-dbb766582cfa.json and https://artists.proofprofile.net/proofs/artist/a2507b62-fedf-450f-8de3-dbb766582cfa.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 0x79132caa93826e8d70024b97248e7f74232e930f25b44005618a52b60b5852ef. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NLCK41022155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a89a28b96e4c3543c355a64b131ebcd9483d0597596a8ab6ae8f5c93f6c2aa6. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GBLV62118721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64797ec69d933d5f1510c7ed1c20ed2ff640586bad0a20af036c7d2855e4aabf. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/GBLV62129442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b86c1fb937af3dd7cacbe18a55925155b7b2744b79440619cd83ba89a7178e. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:38:22Z), 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/GBKQU2336740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc044cf79dbb808ccad8191c29d0dd425a07a062be154f50cf416b6608f4f2c2b. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:22:37Z), 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/NLCK42422628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54d07d1fe472c1cf9366169a78900656728a7bac41317d91bad4a58da5b485dc. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/NLCK42503058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c32defcc24814a58560a5bf27b4f8f8301d8cf5088767cfb0b56ee47f0b0041. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/NLCK42506205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa80eb1df24ede9fca207f16983298504e94abb3e3bcc6a99902b617e24c34197. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T14:00:33Z), 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/NLCK42510932.