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 0xe67aa4bc3f38586cb7356b64666fdcfdb3df7169bcd3bf069f3e367383ccaac7. Chain 2 (Bitcoin): anchored in block 953616 (2026-06-14T08:58:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/19c63761-e04b-403b-af9c-6b355eb711bf.json and https://artists.proofprofile.net/proofs/artist/19c63761-e04b-403b-af9c-6b355eb711bf.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 0x43790b024e90a5676d504fbc79522b460720a3ed401c4af5798108eda5c93803. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:31:55Z), 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/USA2P1161845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa75eb3040adcf7d7ddfb94814e1a334dc5b6f5a059dd359e4ea7b257056479cb. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/USA2P1161846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fcdf6a3299d04aa2e7c9d24890ce8cefd9da90465ceb8f85c350e21ce7b1462. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:49:48Z), 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/USA2P1161847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6be3e5ef82d5be725e3ff5ef890143373b27b0819d6f369c2b5fd709c06ff402. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:17:35Z), 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/USA2P1161848.