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 0x6344044a47bfb2b3b7fedde334e8eb0686ada8faf5b6c29a6b4bae6123af6d5c. Chain 2 (Bitcoin): anchored in block 954048 (2026-06-17T05:00:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/42829a7f-d0eb-49fb-b817-02897e3dbce8.json and https://artists.proofprofile.net/proofs/artist/42829a7f-d0eb-49fb-b817-02897e3dbce8.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 0xb45e4def68942a8162014043636b23eaee9b846189db0600250581547cb6ed7c. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:28:11Z), 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/GX53U2558221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x830a6086667375ee5645ddd74018d68d9374c05263c749ecdf34850ddafb2938. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/GX53U2558222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a14d5968f75e4eff138d3775263036e1abffd2f31a1e7870b439a9bdcac331. 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/GX53U2558224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1db53589b055f678c999ca3ac092c59c85d36e01f5530026ad5ed4c80395b915. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:10:35Z), 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/GX53U2558225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad1941452c5d673239cbc441179fdd15bb670099b3c50f60ef192343be665566. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:08:58Z), 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/GX53U2558226.