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 0x01dc322b94dcb3979870b3a2f2cfe16bd1fa2552a7a032b759746f969cb7889e. 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/6877e318-b1f1-4227-bd1a-c68dda7fae59.json and https://artists.proofprofile.net/proofs/artist/6877e318-b1f1-4227-bd1a-c68dda7fae59.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 0x20c3cd7d5c4d699c52f225906686a6dbec14001a96e72ccde7552b8629299daf. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QM6MZ2077914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1233547155ce287b982a0fef7687c4d91f802429dbf4f4bbe232b5b31ba7624e. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:43:17Z), 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/UKW3Z2302317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34af459b693e496ed69c84b8a20f7ec944855bef4eefd6ba1b28653a5d1282a3. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:49:06Z), 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/UKW3Z2303631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa505fd984e14c868aa97fa23b0f2f3a987056456628af36ab06123a46446ef38. 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/UKW3Z2400445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8842cd6851cb9a40aab307b095dbda50a2c4b68a5b2ea3dd4bb7b6c66b5f34e0. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T03:28:37Z), 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/UKW3Z2400446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x071dfd6c3352ef1a6aa5ae097daa4773209591e87654bfae58a05463db776242. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/UKW3Z2400448.