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 0xc4a41c2629966cded529cbd5d934363049ff63fb331ad9c0cf0638925be903ad. Chain 2 (Bitcoin): anchored in block 954072 (2026-06-17T08:43:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7aa619ac-965c-4d30-9f2c-94a86c9515de.json and https://artists.proofprofile.net/proofs/artist/7aa619ac-965c-4d30-9f2c-94a86c9515de.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
A Pair Of Packed Valises (before The Dunbrody), 1849
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 0xb3ee2ce0619891509e35c620f5e9e15345d3d9f598149dff972c79fddde792f2. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/UKYBD2501292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb508fc642a79a7f3167d37612f1f0470decd36ce2527754163fc60d180cd591. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T19:55:39Z), 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/UKYBD2504405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f887d16f077bfc51a42c3b92ab92662b5d10f3d6a4bf86926a1d9d1e91882f7. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:17:47Z), 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/UKYBD2504406.