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 0x70c8308be63926ab5c4660167cd0276ecbee0a04a9f1a044499f19250e4bc66a. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/041b8968-73fc-4f3d-99ff-594a954cf6f4.json and https://artists.proofprofile.net/proofs/artist/041b8968-73fc-4f3d-99ff-594a954cf6f4.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 0xd012b02f2f174569cd872f6bf42e7ed7fc4d2deb5677b88e21f529d76bfed718. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/TCAIS2406627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5af3f3e09421d15110a220faf8749fa497b3661dcb895ed5751c43a8ecb973f1. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:01:40Z), 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/TCAIT2406636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e7e1f62d3679a4ea51fb075980b9e73629c0529093dd95173fbc7e85ce57fb9. 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/TCAIT2406642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x927be6d6b3588db007fa731fff88dfb2f6e63328cc2353177fe168b2b3564406. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/TCAIS2406652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43dc3710649265d9585c4ba24b803eedd3cc2d7f2f55057c2fab0d518142ba1b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAIT2406663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8207f2507b0ff5434c54527b0dc2c40d837564807e9f81b5ae353f4430427a8. 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/TCAIT2406686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54ddcc9a981d1c163c6da0db7984dd3572ab44161c8ad82fcee64db9fb9d8785. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:34:27Z), 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/TCAIT2406698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20ba25ca9d716059a5123b316deb030b29a8c73fb5342a14e77a29054a56521b. 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/TCAIS2406714.