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 0xe748d1f45e15a07e9a1f709b3f7f41609f65a5cbecaf04dee3c33cc57abfe36a. 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/9b1b0f3d-ef09-4f58-80d4-71ce37bdb23b.json and https://artists.proofprofile.net/proofs/artist/9b1b0f3d-ef09-4f58-80d4-71ce37bdb23b.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 0xd29326c866b62795f14beb3f8a62694d630ac489e7f250f6499b4d53131eb4bd. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:23:39Z), 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/QZXYG2504914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4b5623aeda0991a58bbf8944b488743abdc58193251c5fb6b69c203a771ae1e. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:30:53Z), 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/QZXYG2504915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80f6d80c74fa1a8f6406932382c27f2d01c7d3a655091fada5ea80b80e57b354. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:14:52Z), 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/QZXYG2504916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95ce03ea437cce6b35d7162c5781b83e734c721249b626d2546b147052ca42ad. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:55:18Z), 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/QZXYG2504917.