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 0xb6ca3c35e18cd175768d0603bb802c833a8725a825058e24782b6b97cc7fe799. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3bd7f6ae-5bd9-46bd-b110-9277f40ce64a.json and https://artists.proofprofile.net/proofs/artist/3bd7f6ae-5bd9-46bd-b110-9277f40ce64a.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 0x139db53188cb569d8677c0c6342a802a67054d7b66b3be273948d629396a2467. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/CZH071200016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa05b73ff9bdb08c35fae7b5b785d64b61c1d418163436d51f145238f045266ae. 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/CZH071200018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd68f7d1db5878dc4fb1b5e7a29575e5af389539b5d13d20f50ceb6babb46423. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/CZH071200019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d78f6f7a5ee4e8b99e5526195af422689420453a47f50689a648b166ae5538f. 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/CZH071200020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ec9bbd011ccaca055057a46753d0ced3c5cb6b8a5ff36db7ffb3ca5815dc34d. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/CZH071200021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56c5b68d3d2d3ff8f8792aa0ae2cd18a166a59d195dd637ddbe85ba984d36232. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:16:10Z), 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/CZH071200023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e3f12350843f3fb85aa06500784d21c7c35d90fd4ac33bc92b91fcde7cefd4c. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:05:29Z), 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/CZH071200026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51fcf967a42b821115a67e0fd71dbbeff0696ed5b1abbce76a2d04947fd01bb3. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CZH071200027.