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 0x974b4469fe346b5dfa42a4d35ed66777a8bc30f7cd5391c7f49e8edb58759782. Chain 2 (Bitcoin): anchored in block 954587 (2026-06-20T19:10:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b9534ab5-1a93-44a3-a790-b7cd9abec5de.json and https://artists.proofprofile.net/proofs/artist/b9534ab5-1a93-44a3-a790-b7cd9abec5de.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 0x809a703fc30362bbc6ef4b07889d4fc9a8e969caccbdf5dc3cd6070722ba5a56. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:24:51Z), 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/QZZ7U2444756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a6ce7073d09c499a7bab8ddcbeef9ab2096ee651a893a006c314727900b4405. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:44:02Z), 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/QZTAZ2539244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2897dc5495cc54208b691122cafb7db1abbb51e30ba1fe82bb15fbaa0da2c8c. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:08:41Z), 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/QZTAZ2539245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x376fff0cc396172b7082041beb3ebcae0de851d7f400ccd8ada1ff2f451c7748. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:48:49Z), 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/QZTAZ2539246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf09fb66e696ce6bc423bc5af6caa89a63e88dfff30cb8d09acf8001537bcfc1f. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QZTAZ2539247.