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 0xc40188fde10d9cc324b300283d5a8e16bcf1396a7318729526db1d8a87acff88. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/43f4c763-ec87-4ba6-b445-89ce3a0b5528.json and https://artists.proofprofile.net/proofs/artist/43f4c763-ec87-4ba6-b445-89ce3a0b5528.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 0xbe0245b94fccaec45dc5b46397cc67da71af3ea2af87370cfc7bdc8caf5946e8. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:32:20Z), 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/QZHN32233650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76ff679015893c1eda535824933f69065a500cb340ffd0b0404570837c4a02bd. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZNWS2209629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe67c6affb94a193f812a74ea9072f045e0ef0b5e601b74d9a3608bf76fa2a5c. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:17:41Z), 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/QZNWZ2202487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72fecf8bbb3737b52a1a00fe69c49cb24dd4845d1ea4ba9629aa336cc2b428ea. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T02:28:02Z), 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/QZHN32305296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc779116138f5b8f71887a69c283dcb163f4d72d5b203b0b3f88c2983a6352380. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/QZMEM2364368.