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 0xd35524d32ce6a0bd061626ef83ffc051e72d34cc711a3fbe28137bf8b6268658. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/db7ef9d1-b451-4669-ab50-7e10688ffe4e.json and https://artists.proofprofile.net/proofs/artist/db7ef9d1-b451-4669-ab50-7e10688ffe4e.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 0x8d9e3d13b87014984001f822a0c82b779f5e4ac424e7882ebe5bca81b967413a. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:49:23Z), 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/QZES62476152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56cc14ace3df5a38111d751009201efa801c2c83e2ffbafdfd3d71d5a625c7da. 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/QZES62476155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf19d8c5b3887ff426d0c85f9cfc6f333d09b7af38c65e3832268ad57bf3cb15e. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZHN52507435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22e2871b3612cfe345c7cafae7ea52368a4d2c1fd3ad6d0fea6f2dea97194ddc. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:20:53Z), 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/QZZ782502487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3facdcd53d10840e66809fb9447a2fcdfe97719fca17cb180ba36280a1d07fa. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T22:01:56Z), 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/QZZ782502290.