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 0xd5446ed3813412ed037df64711917523b42e0c349ac429941c19b187608e5c1c. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/503e4cf4-1ab7-4010-bdda-3e11a5c99295.json and https://artists.proofprofile.net/proofs/artist/503e4cf4-1ab7-4010-bdda-3e11a5c99295.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 0x8a45fef82e838fdf0719d743fe5289f0a4ef04b6778a356cb41b4a56d4aadafa. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZ5AB2477651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9e504525b0503da7ca117e6ed93b01f2f3b091da3bf7d20736da072347b7dd2. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZ5AB2477652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ffa3a1196f40067fbb83e953b2e05f2b76cef17b5e76d17f30f476a73c4f2df. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZ5AB2477654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe704103556b0beebf88255f8838db025020e86e89a6341f6a595e21937b6cc56. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:45:20Z), 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/QZ5AB2477655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71a4c24b92a29a69b465c2eb6a0e155335ca48f51daf0affde9941749fafb1fd. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:46:41Z), 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/QZ5AB2477656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfad9557814ecfa8cc54a5f9ae6af7fb348a8c5e122dc01726433b265423a3a42. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZ5AB2477658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e4696998c9a7a57a0885f0242991208d8b96d9e1f95a430632e24885d613091. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/QZ5AB2477659.