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 0xe7fd1684f4d747d3a99d70cc26cfd39ff2c82623da465c8e6950cbc963d49cf4. 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/74b4be89-f429-4f8c-b6ae-68fb2e018955.json and https://artists.proofprofile.net/proofs/artist/74b4be89-f429-4f8c-b6ae-68fb2e018955.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 0x18be54fa6b0dfdcfe636e0cc36c9ccc6e568f7d232e749fd7235f622db57d7ba. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:31:52Z), 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/QM4DW1842619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2c1624b15ed2fd37e56c9241f67e3297998ed0a54cc1a5c54a8e457e546b537. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCAFF2038899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd3855f6651f5e9611265d9dc84be43ef9202e375e018129c3f304bdc5d35788. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:22:33Z), 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/QZHNA2129468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46eba1c02e613fd0cf5b38d473a28d85388ce08ba69a9c204de3006531c2ea52. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCAFW2137210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50f8f4127b4f52b14ea88dd070b806491d663859d603df52a31d75315d9f73c8. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QT2VB2439352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcdf4a67d6179bd9491b24e26e4086e25b4d808827327b5e052123662956badd. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QT2VB2439364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1401276bd92eef50b6ad6384695b380328ddc747a5d29224778b41e8134d2f8f. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QT2VB2439367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe113056d0adf34e5b080618b882d63eb29564e2331df0ef7d37a56c954c4bdf5. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QT2VB2439369.