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 0xc072056de194ac31d45ea13f84616d1798e8b8ca5d8915ea260cc4ebfc31b6c4. 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/d9e98cf2-aecb-485e-a3a2-c7bd7339c9bd.json and https://artists.proofprofile.net/proofs/artist/d9e98cf2-aecb-485e-a3a2-c7bd7339c9bd.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 0x044c4b8937cf47a2fafe5a9b55f3e840c8c976effeab36e19a9f9a24daf722a5. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:07:18Z), 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/QZNJY2386186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c25c27478061f27a193faa8560c80dfa009cf307203e2ed758d5036fd73b7b7. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QZNJZ2332157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6814691a1e0d5413c245495e0594e53d095a05ff5e32cc8aba81db7ebae8a9a6. Chain 2 (Bitcoin): anchored in block 958676 (2026-07-19T05:43:13Z), 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/QZTPX2309853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5daae365bc857b9ae85e898aeb6d66e365af713029dab9d09fbe9423343da9. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:33:09Z), 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/QZW9L2304056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd59c4da7d0060b720f61ab065a73f9aa797cbde95bbd6b564d9e87df76f72d0d. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/QMDA62402311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe022c7990b486000c697e85975af4cbc3cd7c87e55a2c6d55430cfb0a6a00694. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QMFMF2433331.