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 0xeed9105daabcd204f4c228ca0586c9216a41f73fb4bcfd49918d3dfe06abc0b9. 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/c7d64a2f-10fb-4f08-88a9-6a555d658730.json and https://artists.proofprofile.net/proofs/artist/c7d64a2f-10fb-4f08-88a9-6a555d658730.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 0x3a52ec1a77f386ef756a9488adec4da161b9ede8138659fc0a72ef86d6f66282. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZPEW2424727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4cd3b533be5e6d7400bf7693a6c1a54397e480ebd3b8981cc8d542a62a3a0d4. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), 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/TLVEM2458730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a0578761be6b9332029b0270600aeaf3cdd6adb2d3e056fe1013eafc95c33ff. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QT2VB2416387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd27ca9b6b509ab4637c775cd621e21a04eef5fa1bdf52529bc98d18a71d164f5. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:21:29Z), 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/QZPEW2512565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17ee9757f4ce829294bf57de93b6c987f4b8b0df549dfeb624334c7c5afb7554. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QM6MZ2538189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2827e53ebb3b8e27c1d89a9a169d8229a1577a7de8299b2f5efbaf488412a48. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QM6N22544578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cc8487007bbf59b0d2b6a1dce76040926b7f64572c809d3aa49af6b8ee36520. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:40:02Z), 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/QM6N22574858.