thumb|An Eiki EX-4000P movie projector with a filmlooper designed by Studio 2M (Formerly ) is a Japanese company that manufactures LCD and DLP projectors, related accessories and overhead projectors
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 0x649c5a60e574b25624142c8329980e0b4278ed78c164c3cd94c4d939bd94f51e. 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/210bd1fb-b449-488d-85c1-dd4ddc68d363.json and https://artists.proofprofile.net/proofs/artist/210bd1fb-b449-488d-85c1-dd4ddc68d363.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 0x7f8ea654de8a52f5e0475940a8ce7c47d10b92437865ae856af03cac2daeb090. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/US3DF2271429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69414926e6e2c93d389491ab43ad109c8b015244b76098f7807b2185665c7fe4. 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/US3DF2271430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7463ada8b0d4344ef107f78a897095ec4eae82a956bac3ab9510e534c3d3c47c. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/US3DF2271431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ae72985263e39846497d8caba624669577de5753199839ca24e35995c0d0591. 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/NOPTR2410010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf748cbd7f21653c50308d594316c8890827572e0b406cdccb216d8566d8f7ed2. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GXBDT2435315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d7faac8b439da2f2aa2c8717ae513919d6b398ef134031efd1cfeb10e587b78. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/NOPTR2519010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44da431f73eca256e144282a91e2f3f38a803e7fd829d61f489f0b3bfe09f41a. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/NOPTR2542010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe854b8923bcbc8b2cfd1d5b47c2e7fba0ac778027624450c342a97bf7f2f495b. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/NOPTR2547010.