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 0x4ab4021b158a555bb654e97b0febeb32cd50acea9e75af6a959c4187ee6ee706. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ba8d5dbd-ccd1-49e6-a220-e3eb3e6d6ab1.json and https://artists.proofprofile.net/proofs/artist/ba8d5dbd-ccd1-49e6-a220-e3eb3e6d6ab1.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 0x9f0f7f8e82f5428fd6a22877a495f785e0f04cfd7a16d02ea823fcae422f7a57. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T16:00:54Z), 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/PTPA11200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb33cd781306e21570abdfcc8ae62c2e03457eced4f2380db387f0719131d7538. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/FR10S1649788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea0800c1a6d5d189d450f160a6881b07a96c302f9175af03d02957827953898. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:50:18Z), 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/PT4ED1900032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe734f2f6b9cfe8b018942cb149c2f92e73ec09569d4c2ed1cb2ea3a848aec2df. 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/PT4ED1900033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf48a96d14f0d606955c027197667ebb761bc2db10fa1af9beda111e0e9e48a63. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T01:00:22Z), 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/QM6P42531584.