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 0x1758dd26547a0a46814f5dc72cd47cbc48487203064561eaa33f0eaaae84881e. Chain 2 (Bitcoin): anchored in block 954742 (2026-06-21T20:46:40Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fea8c59e-caf7-4da5-891e-717dd46d7c9b.json and https://artists.proofprofile.net/proofs/artist/fea8c59e-caf7-4da5-891e-717dd46d7c9b.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 0x62c8053553abd0c046aa2ae4708805e282e6f17d264de7344e517c6ee3d43a37. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:14:11Z), 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/QZTBC2493130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52480bc80ed53a06c4d3410d5e8e38b947e32a009f0c742d21d2e9834c6b9ba3. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:18:21Z), 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/QZTBC2499147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc53608b76b685f914aee244ee39492353c3187d1cd6288100b1ed423ffd2a561. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:54:53Z), 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/QZTBC2499148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd579f733bf5da25c8b549885fd775ad6bbaf747e4a875ec0d12b19f05fb871d9. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:51:26Z), 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/QZTBC2499149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dc85ad285ff477522738f5951f5f4a65e6b9ca9672bc9cd6a15614132a65277. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZTBC2499150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5374ebf328ad8fabb65efda6c7617fb8535ec3a559e06a01e46e9773791600d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZTBC2499151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98219ef3842d3a0d80dd976852e2b068cd4283e8d3a9752db56b7c1927232c96. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZTBC2499152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73e909bb9ff314bcde00fa8e6f9657b92e19ff3a695c9a1bec2e733346383232. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:29:28Z), 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/QZTBC2499153.