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 0xd27ae3784510acf2e7d0713c05c0d29b15129e7d9151a3227faedd36a1863118. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8982d27d-4129-4a36-b891-4dce4570aa76.json and https://artists.proofprofile.net/proofs/artist/8982d27d-4129-4a36-b891-4dce4570aa76.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 0x8e2f145bff424a3b118083f5cbec831655f12156d6ec2da482eaceaa07b243ad. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:43:22Z), 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/ITZNJ1400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93d0e86329642b199d27ddf9c528453618f961c0c1f017afbdbdd0da8ed4f7d0. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T22:06:58Z), 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/ITZJN1500023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e5f056880fbd6ea496a2b834fef973abd11fdc0b56cfa035f9f2810865aca9f. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/ITZJN1600027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5cf9600791f332a7a48d490ea95361bb378bc44957ba0dfcc7540b012bc7a12. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:17:09Z), 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/ITZJN1600030.