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 0x0009179f58150efcf2e2cb99ded4500dfea01b2ada2b50376e29e0fc5d086a1d. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d0db4ff5-68e3-4a91-bdaf-9726b16b5ca9.json and https://artists.proofprofile.net/proofs/artist/d0db4ff5-68e3-4a91-bdaf-9726b16b5ca9.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 0x750f0d39916b9d9ce7410db643a2668db953d89312fae5777558749b791cc054. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:46:15Z), 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/QZDA82436808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ceab058757c77a63c099fe28d30f65a560c0c1cba963fb2f20b1a81d5f088d. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T17:26:42Z), 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/QZMEN2445592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2907eb8962fc90e720607e7d9602d00d1e669638da51b12be13fe886d976a2b6. 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/QZPLR2493073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ceab058757c77a63c099fe28d30f65a560c0c1cba963fb2f20b1a81d5f088d. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:03:37Z), 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/QZMEN2445592.