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 0x49d29f7daba1409e0ae2c4dc1f7bbe4c20a1e41c0848407b46fdbddedd29eafa. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dba0081e-37da-45eb-b2a9-84f62ae94c08.json and https://artists.proofprofile.net/proofs/artist/dba0081e-37da-45eb-b2a9-84f62ae94c08.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 0x02a638e9f54f9f9657af6ebc679f2becaa706d3876a3f510e91191be9666783e. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:35:13Z), 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/QZK6P2374796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee3044e5d1d606dadcde528c72ee5ce601d68a722fb76ebbcacfdc0689827fba. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZK6P2374798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67eb44f65fcc2e9a003822d65205caaa2aadd97cb81900a05cc74b3c148a0fea. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/NLCK42405812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67eb44f65fcc2e9a003822d65205caaa2aadd97cb81900a05cc74b3c148a0fea. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/NLCK42405812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd90db8cf7d22d5ce991ce0afe42d96a8057da5e9a219cc133bad895d2cd5beb0. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/NLCK42406339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56009ff92417374af5a0c411bb44160bb6c4ac6beba758e8d5194798b5cb6f13. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:57:18Z), 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/USYBL2510674.