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 0x8a46fcb109af21b2cc233608893fa7df99acb53f2831ffa8411eb77302c25d32. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8ac9b224-b3ae-467b-b913-b91bbb79ff1c.json and https://artists.proofprofile.net/proofs/artist/8ac9b224-b3ae-467b-b913-b91bbb79ff1c.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 0x8a86b57645b13dbae0b8e9d40feef6d54acdf3f8233dc8d73a348fcd497eaabf. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:49:00Z), 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/AUBEC2015878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27f38226285bae8811dd5494dc0b362a3823f0eb89c35791e8857756f3f2228b. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:42:34Z), 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/AUBEC2025276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58d88d36830224e52ad8c787faf349ec66d5b8e0556c8812b957d33f9e9f172c. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/AUBEC2164251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd42e20203237ff0c1cc104ed76cc35e706d10a5d3e898320cc28844552f869f8. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USUYG1446276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaee821ef45e89ae10a7e9a97a9ab8d26cd07f7171367399ee26d932bfd56748b. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:06:23Z), 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/QZRP52327613.