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 0xc291dbe7cddf26fa17678ab2a35b626ced8b74f922a8395190d13c615b44c2b6. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fa88a55f-75dc-4b2f-8502-cf99e0e3a0fb.json and https://artists.proofprofile.net/proofs/artist/fa88a55f-75dc-4b2f-8502-cf99e0e3a0fb.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 0x29fced4cebacb25fea5a9077755a85477e00d287b87e53db782e6ba4597cf9ed. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZW9K2326227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46eb37b21a17040e8444ee6fdc55bc0d3995613e06fcb7795d904ab83b4a37fd. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:48:09Z), 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/QZNJV2524588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6a9f9344bcfb75f37087e537a56606bc80d88db66a01958b915ba25fbf62ba4. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZNJV2524589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e01fea36c3a6d22c59134357f7d1a714f9d8a3ba4baeb07448e26c732630b99. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:10:14Z), 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/QZNJV2524590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6cfe4fc752d3674a311faf3eccb583f60b50793f71d111718b4bfc8671a2814. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:12:35Z), 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/QZNJV2524593.