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 0xf0e7fd3eeb18b47ee169e1ae8e1eaa83b81bf9301f15614076f0f05bbd7cec64. 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/6c1c10bd-f744-4013-a191-64b90334e2a5.json and https://artists.proofprofile.net/proofs/artist/6c1c10bd-f744-4013-a191-64b90334e2a5.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 0x34ed3144f7e42206286d951c15f98494ec51c403dbb88f8c05f6ed28ba285f1d. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SE6SA2489496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x446fa17cf33f3c8a0b6508cddcd5b93dc1383fa893249bc1cd94508b44bbc25b. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/SE6XW2427218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca4213d1ebb5c04cc8366315edbcfa092cfb4bd98e58c0c12918bd0247662e51. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/SE5BU2523129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf1743626c61ef7b897453ae35d0237cbd7ed5d5dff460f226b0e60928d0767f. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:20:57Z), 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/SE5BU2568710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa205c5c8fab9a8d5f41298c3d5bca9ad4c263a81a392571f5147b0710656e155. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FXR752502174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2344e965767c73a84df3fd96e47e6f93bc3e59a47e7aa2d9aafd2ad083955a9. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:29:25Z), 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/USANG2509242.