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 0xbdc1593c6ddffd9e504573b0d5f025cb98e7e1f92f22dfcf0b2549549f8f014f. 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/7a757868-0dc4-433a-a494-9fcccbfdd134.json and https://artists.proofprofile.net/proofs/artist/7a757868-0dc4-433a-a494-9fcccbfdd134.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 0xe445a3780d6edbccc3679b92bc062dc417b0529ac86fa98802bea8639aa177f8. 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/QZUDG2400287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19faa0ffea1849981d60b55a169f04b35626c9608cb403d85d225d4aa8983482. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T02:56:42Z), 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/QZUDG2400288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd829ef66efe37fd76bb38d6a3813ac3c3b62f006ef7ffdcec1d13a26431e253d. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:35:03Z), 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/QZUDG2400289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x281111ec7e910fba8e4bb053c11a5b7ecd8c696b5017b4e71fd0ca99f4dbd238. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T04:12:53Z), 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/QZUDG2400291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d359570737edee9b049df068522db5d7af7f7cc5387bb8c9cdbd52f613bfd8. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZUDG2400399.