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 0x1a55a9f798a0cd49c00c2a7fb16226af059b30767284dc036925df60be6234d9. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/63be8e8d-5f5d-42a4-b255-c3715b5c73c3.json and https://artists.proofprofile.net/proofs/artist/63be8e8d-5f5d-42a4-b255-c3715b5c73c3.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 0x2d16f4fb7df9578e5206061a6f0e1cf3d83d0a90ddf74a24b4ab021ceb809396. 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/QZNWV2359518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00afc90f61d543920979bd1972c69010b41f7d4102f1c405a13be2210f7442c7. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZPLS2361439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa75f0ab120a5d1cbda3f78471bace9c224ab6b7ee398790fc7928db493f091c5. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:48:14Z), 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/QZK6N2417968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x491e992745aaa135a3407b3a79876123df4ab863e637deb5bfdd31d6ce81f566. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZK6H2432094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb40d6d06bce3d1643832c5362a9f7756c4ed03079987597503d14404fd562b84. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:46:52Z), 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/QZFZ62522423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ca1c0b8a093ff6e1d410ffde442e9f766c59bd07e8746697313e50c1c4618c0. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZHN62521267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bfe0d7c6cd33b97c576ba4ef7e85db6de3fdd83e20348d6d8b63ca0c0cf99b8. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:51:22Z), 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/QZTBD2513214.