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 0x0c8658794204f75b5e9974f1b0a865f3117ea7d135c951981558afdd84c4b75a. Chain 2 (Bitcoin): anchored in block 953645 (2026-06-14T14:31:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3e1ca1b2-29ee-492a-934e-b34520399411.json and https://artists.proofprofile.net/proofs/artist/3e1ca1b2-29ee-492a-934e-b34520399411.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 0xa0f07d8177399a678dcccfb94ccde430b69cba10eaf573f372e9f548da5006dd. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZWFH2499178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa18428d7bb64d0fbc421279d41cfa9dc7231045f2e42b08ac6ae851bba30e80. 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/QZWFH2499179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98e2c73963c97d2718d2fc00487a56f64c5bd90a3dcb9f02430aa6e3d8ab27c0. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:40:44Z), 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/QZK6F2465848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f56c4d46cb10266d01bbed0e6b7fd9c20bbd3726a57f4dee0d7776d7308ee12. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZWFH2499181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32935955e494fd4d165df33e6e9b6c5ce195a064bf48539ca10b3552e5a860e1. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T03:25:04Z), 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/QZWFH2499182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71b43041ec1aa79186d11202f955ecec53c2fd103494f6f1eaedba9866605fdd. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZWFH2499184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa421f07c58bb2b63ae6c0fa9c9c91338f4fe0a0297bcaf31d53cfddb8055c328. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZWFH2499185.