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 0x6fef9330a96ffc81a0c98a845a96650960a50e76331718b740ed40bc4ef8df99. Chain 2 (Bitcoin): anchored in block 953772 (2026-06-15T10:33:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c427b8e2-8a19-4660-afa3-852005fc8f84.json and https://artists.proofprofile.net/proofs/artist/c427b8e2-8a19-4660-afa3-852005fc8f84.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 0x197a3ef5a00f9bfecdd9e6404e4b66faa1fd805b9ea739e41e6f07e0b4ece815. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:10:34Z), 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/QZK6Q2479066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbef77c19ff2afc70144a7cbd9728c616068d59c3be9d519e7146043695e6b7dd. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/QZJG52468738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x459db03ca99727deeb661f04842bce00eb0267edae1a0e57ef6b775c6867bb2f. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:19:31Z), 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/QZTAS2425381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cd98548373237289c6c7ea885661bb41f93b15335b63634e1bf5764b32c222c. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:04:23Z), 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/QZWFK2428974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeec10fd2ac0a3c5a8c28a3660b4de64e3d768d7365aba161e75903baa028d21. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZZ7P2439250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18408e700d7eccce7927b53a153c61670a197e71ec53dd74ced1e402d2b1562a. 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/QZDA82503118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f9caeb1fba5807e7540e3d28cb1d2ef521857b8bb190b84a7ae09f49cfdd027. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZRP52540444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1977d3bfff988fa57aa19e219660968a0269e8fe7e26f515f376785857dc05c7. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:44:11Z), 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/QZTBF2526853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46bb6a255b441976442ac8f8f5d342d92ce2f64741dc6381fdf61644282ced83. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QT3F82566810.