thumb|alt=Congresswoman Marcia fudge at an outdoor gathering holding a T-shirt in front of her which reads "Stay Woke" followed by a tick mark inside a box and the word "Vote"|U.S. Congresswoman Marci
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 0xa56a28df3e8246070c5dd2bbfbd77613e31b6236455a083ac1fe268a1bba9f73. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a826bfa8-3585-4617-9db5-8624ecdc7c73.json and https://artists.proofprofile.net/proofs/artist/a826bfa8-3585-4617-9db5-8624ecdc7c73.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 0x5221af49e57fcf2e336ac3d4a36720e3ceeb724cf89b41e2609cea8f060e4a00. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-21T23:16:03Z), 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/DETM41610991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x045138651fac9984b2d7f0e76547e58f9f37bcf2c3395304f4e95c070de50bd5. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DEH742506987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x526678e39f832b68a24db5e67a36206e494c15820bc62aadf877a7bf5101c40d. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:26:33Z), 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/DEH742506989.