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 0x91364fb924c3c7bada7ab22b5d0325187f637aa143abe7b548ed5a1fe5a24f86. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7a474d10-1b19-4e2c-a050-3b06828fd1a7.json and https://artists.proofprofile.net/proofs/artist/7a474d10-1b19-4e2c-a050-3b06828fd1a7.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 0x16ca35398a4ca4a7c94074c15dfedd266177cb92e1c91f72c649aef963392900. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:37:28Z), 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/QZZ7S2586182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fe27064b0bf333a6785670b69b5a2501c9d1223adaad02b66081711731d04d6. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:16:05Z), 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/QZZ7S2586183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x673ad2493b3f8ea539c81bbac708de8e713f07e46ecbf83dc5d46252c2c44333. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZZ7S2586184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x942847a5f965ba41abca46f55e099e69514d8b27a3206bea1ad3dca71b0bdb1f. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:04:25Z), 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/QZZ7S2586185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x232fb6c56e41efff770e807580e7d349833302efd67f11c871e7e0eccdc178d9. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:38:52Z), 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/QZZ7S2586186.