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 0x287dcc4e79bc1243045c59077a0de2f88e6c9202e78eeaf9d2ce5164cac85cbb. 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/a134a66f-59b9-4c04-81d3-91a3241604cc.json and https://artists.proofprofile.net/proofs/artist/a134a66f-59b9-4c04-81d3-91a3241604cc.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 0x85094432dd04c4fae95d060a2a9af5f41988a47c5146e77b329b5b79ccb791a8. 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/CH6541689720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88db5dfe011c3e32c42493928c537ced9791069729d5257ab4a9751b1c41cd1e. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T03:36:52Z), 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/CH6541689722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ac1a5733672a77840ea0a878de41c2b1d3d7a7f9b7eee08fd48f07145b01d41. 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/CH6541689726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e31396cba69a4c07e418047b818d1016d271938f607f66b5bd5df879f6401c2. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:27:18Z), 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/CH6541689729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98ab7acd48ab5b97e4650885346e01dddb053d8b3ff126422326c0c8ff815695. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/CH6541668548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8e1f435ac3186f0df4a5d1eff3ded85a636b87a2fbfcdd2e1e05317e841dcdb. 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/CH6541668549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57ae1b688c2b720b8ef4d28eb780bb06b3514c85a49afe0d5e45291339aa6c21. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/CH6541668550.