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 0x7d896a5b55462772ba8bb881b4080f3aef9c756325338ef3b492a63fab4546f1. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5a3c61a3-407e-4b18-80c3-c4f76c1b1277.json and https://artists.proofprofile.net/proofs/artist/5a3c61a3-407e-4b18-80c3-c4f76c1b1277.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 0x05194b603d30430d4ae15e1e22fa864ad4efcad1e0a0a0b13a9b0798a94bcc67. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:17:10Z), 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/DEZ651301323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d81b9edb48246b814204aa31d8401168153c2b6bb9b9b2b5fe30607239be7c1. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:00:04Z), 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/DEZ651301333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62585129b0a07992ff9f22b44e0a3712a83ff69cf99d9aa6e932f80c34993b92. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/DEZ651301334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb5ca3839f2e03e9161fa2dc1aaebcff53267eecddeae2235295b16416d20ff4. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/DEZ651301322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe76ff36b13a023becd6b90714ef5d77a416222df1f69694a4f76444027742e6c. 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/DEZ651301325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3135d9c27fbab38cf197c226c39e01f57c419e5cfd8aa990989401d708694b7. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DEZ651301326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02c749dc678e8754a7dcaaca2965b5e80b81353ad26ce4618581ccf3ed50a501. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/DEZ651301335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14e82029b843124d1af6d7da65d1ac1a73049fae25beeee5e59f4be9db68b134. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:57:37Z), 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/DEZ651301337.