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 0x9c6bbafcb7f65ae4c94b0924db09195d74b7ce0d2c7b8587c4d2b9f42abc7ad6. Chain 2 (Bitcoin): anchored in block 954623 (2026-06-20T23:40:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/caa22ff1-8b61-4624-a751-74dfcfa7169d.json and https://artists.proofprofile.net/proofs/artist/caa22ff1-8b61-4624-a751-74dfcfa7169d.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 0x043de13921c68b07a74f1d3d472b98118a411eff7026f535f5c2ef51f2c8ce1a. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:40:40Z), 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/NGAHZ2400997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84bd0985cc4295b0115efecc9fb60da08671481c0bf622cee0724ede77965a0e. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T11:07:13Z), 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/NGAHZ2503274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe003e75f614660aafb6b6bcfc2f373821ca707fe11982572872435c65598d42b. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T03:09:26Z), 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/NGAHZ2501133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd086a9778c29bf5fa949574587e4c68de246f80b86e7e4526f48300e8ab1540. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/NGAHZ2501608.