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 0x6507aa26807bc3766aedca03042d1a7c58631ae63cfcf1740313a41b80cadb94. 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/6bff4884-ee70-4a4a-9aa9-8d20106789cb.json and https://artists.proofprofile.net/proofs/artist/6bff4884-ee70-4a4a-9aa9-8d20106789cb.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 0x89d7d80e1e4c5373c756c8e76f7ce4c1b4a3289f4625b2f020bf600b2ee2d0ff. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:16:00Z), 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/ESA112309487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x852d0679d9215e0aa2dae95ef61fcbbb0d27b03ee23ea3f0095bdd37fed827f3. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:31:36Z), 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/ESA112311682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb4cf2eba190476895212cf117a8332fc31f9280018ae9b4f84e3248d4430bdb. 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/ESA112311681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x261aa61e0cb2202b46e52adec39cba50828aa33abb35a02d2f087d9969414ffd. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/ESA112431764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e0efafd53d19f71eb5205c3b8d6ce3481544013cefaa02a5a9b0392c44a5040. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/ESA112435661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70f8f081ac7e711c9d01014876bea4fcb4686becedc7c954e826863275a03d5e. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/ESA112455175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9805f650fe117bbe10d68b62a62fa77bc2a43a393e8689d151d0cdb40115e4f. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/ESA112559140.