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 0x7b9b259e23633db757218e4dcb66b94bdd3af02b1315f8c019e35460e615047d. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e51bd4a9-57ea-4203-a855-35ed763e6066.json and https://artists.proofprofile.net/proofs/artist/e51bd4a9-57ea-4203-a855-35ed763e6066.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 0x56db7e179ecc1fd32fc01728a43421d9c829c77b3930fabf56a7cc17d8a04a90. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FR86E9200111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c0bb4038763744916fe4f066752291c50132600c57bcbe66c65cfd864a082f4. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FR86E9400124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14d95ba56a3997e6007561ea0db02ab638a5e61ea1e90ad19709684161ca69b5. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/FR86E9200102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaa79898030d22b94b01efff8f7b878f81f20d5204992eaf90e79ecf002598e3. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/FR86E9400123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x880bcf2dab7ca52ad8149f7004080218a6916802aec9e20f9a78dab41e1a9099. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T05:02:28Z), 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/FR86E9200100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fc129d32b6a79625b44e52975c9184b6c8cb250b311726794d93f1718de1766. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:23:44Z), 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/FR86E9000109.