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 0x872a3c89918d306aa1923dd931e83607088b18ab322406b73663d7886ab2db45. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/44b5f091-a2b9-4e26-af49-2dbe519ce28b.json and https://artists.proofprofile.net/proofs/artist/44b5f091-a2b9-4e26-af49-2dbe519ce28b.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 0x26f00162342ba045a18cdcf4a551db4e50e6cd9fe3d099c6f731430257f11b35. 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/QZDA72556506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5a58738df15f1b8ce1e58912fcc3310d5886c6f2fab28b924e04f9702ad5187. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/QZHN62592579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x381a63d4ad3f56a015e21ef3884f8304d2462550d467d9678e39026ceb8243ec. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZHN92553906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x381a63d4ad3f56a015e21ef3884f8304d2462550d467d9678e39026ceb8243ec. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZHN92553906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0908669f8d0d45ca6b4b186a40cfca2324bc923a1ae59496ffc10ce6f5acadb3. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZHN92553910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2408b66a8c9f83d65555288a832f7aecf34b5d347a419b08b3c4dd4308fcc39a. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T03:11:29Z), 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/QZPLS2503304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72478beb5d7c26c0a12db0ef03457a419ee692e0cb9ff854c69ff051f22ce9ea. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZPLS2503305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c2973e5b8e5f2568f250ea4d627768a01a9010913f10d75df91f33826797725. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QZPLS2503306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aa28b3fe6d4fd61cc83f56d91d125e4621959ae4ca9ac208d8b5bc9e457886a. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/QZPLS2503307.