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 0xf8430189c5ec959fed5ded0ca825b05a033a567e62ed78d978b472d3c5cbd86e. Chain 2 (Bitcoin): anchored in block 953695 (2026-06-14T21:42:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/727856b8-073c-4ce7-a8c7-519df535f9a5.json and https://artists.proofprofile.net/proofs/artist/727856b8-073c-4ce7-a8c7-519df535f9a5.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 0xc7aa58a019db49a46d9c1000aa460caad30fc7088531f3a2418bef271398ba49. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:28:58Z), 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/QZHZ52289409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4796271cf8f62001c6d9e2f30e597f09d3098c127759f122a48bcc0a95e21057. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:20:21Z), 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/QZHZ52289407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x809eefb69877e0e55fba5d0992cf70b7a155d3c5d4e82711f317d576909dc83b. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:03:20Z), 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/QZHZ52289406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5caee7bbbe9b66d28501b3539e4aa0dcbb8043ea4a51ff3abb1ce1c14332d29. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/QZHZ52289408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbd2ec6b1269c9d26b8c11fe82a3f99b64894bad80aed110e67d967610169d93. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZHZ52289410.