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 0x3b4d5e99f0ca7bf80cb63d75e734b47b8616c015ddab32f65d46485ea5045a9d. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e69ab61d-90f6-4acb-89ec-3e3d4a71395f.json and https://artists.proofprofile.net/proofs/artist/e69ab61d-90f6-4acb-89ec-3e3d4a71395f.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 0xe0426b4bb15c6d1d5bf12d3f75d93e91305dc8babf077c91e8518dd218d1d9d2. 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/QZNWS2384909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6007685dd7116260429d46562217f94ff83d9fb71614f3b8616eefb336380479. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZTAU2383912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e1ae2780daa449b117b92e0165596bb0e2b6809072cc21f49f3c6b165e25327. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZTAU2383914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b77b1971756ede6c64317b11fadaf8c964dc185dcef18166bd3ea3cc31b0c5a. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZTAU2383918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f2f9031e1bd3faa0bd04350e0b1950798efb557249ec2156e014cf29d69cb12. Chain 2 (Bitcoin): anchored in block 957735 (2026-07-12T17:47:43Z), 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/QZFZ62455341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc86676310c198b6cde47ef7ad10ce4dab1644406703eb99567cfc67988ac6c72. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:23:48Z), 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/QZK6G2411086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa82adb3d43014edfa66185e44ac2429d7c6b0b27c34dfa5553908b70fb38e16f. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T10:52:28Z), 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/QZWFK2488981.