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 0x0ce8bfca64cea958ede750b83d4f7e4e7bc6e6cd9547a48a47cade419cc269c1. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6e6a80db-7f46-4147-b80a-7abe90c9548f.json and https://artists.proofprofile.net/proofs/artist/6e6a80db-7f46-4147-b80a-7abe90c9548f.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 0x73849e0bd2afea8a681486ade724ff9f34c15c438fe195c425c43372b6a3c1fa. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/TCAFF2054670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9239644c3e04aeff8d329c9da658357cf0196a01288a002cfec5f9db597e660. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:33:17Z), 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/TCAFK2162868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x483ec57a4388a63b7f3f52a668684b0f7f37dd16d61f19082617806215fb90fd. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/TCAFP2179282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x510552759f8b5bc27b7594cfc27d5c806c61f57eb49c0cf096871745f99f9869. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:35:45Z), 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/TCAFD2021269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a7a23382b7c24e54f56987a04e7900486dd01c09f1ebd9104ac5b06053c03d5. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:56:32Z), 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/TCAGT2356622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30a5b4761c74eabdad1bb2fb074dfc663b0bedfa70d4059dfa52b7f71211c7d7. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T09:42:54Z), 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/QT6622547132.