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 0x765fbcdf1694d93744bb786e2b036c937b7685fc88172087cd1bb51458456853. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d2800692-8f8c-4967-afb7-59c8fb6dba1c.json and https://artists.proofprofile.net/proofs/artist/d2800692-8f8c-4967-afb7-59c8fb6dba1c.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 0xb09a7f611fe1ba9b2412a3402a8647298a268737131d0aeab7c0fb49a7840b0b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/KRA592101942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d7a1d5c4f044e096fe25091c95ffd2f89c9aeaad431d0e8a420dc1186a32764. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:51:38Z), 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/KRA592101943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x671e757a803ca91d589ba08e243db0676b102e01ed4c7848722eda51fa4d9f2b. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:40:30Z), 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/KRA592101944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9e53da779b12f4fcc64727fd52b4bbd957d77a9d1cdd37eaf3b445d1dc0f0f1. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:03:55Z), 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/KRA592101945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83981d2e7e18c681200a6d33fd7d65d2110cd36092ac24006d3b57a3357d2902. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/KRA592101946.