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 0x641a4bdc37977685288a875f510887f37dc746212cfd17e6c5844864f6d3a040. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/efc3a57b-b072-408a-be37-1e18e825896e.json and https://artists.proofprofile.net/proofs/artist/efc3a57b-b072-408a-be37-1e18e825896e.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 0xcd38f48d2f2155cb9a4ba0c36851ccac37bab3da00e49f8bcaa1e711628a33e2. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZYXP2329725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb433a175dc5d3eac48c8c6db0fa0b566603cf4911dbd28717f6306a7cee4867. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZYXP2329763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5afe0dc1e671a2c344efb1bb91ad40508f05da22663e9e1f75c5475f0a22c6c2. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:53:12Z), 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/QZYXP2329764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x058caf5faf846894da3f16da37c0a4fd905351d68764cb9ff2905616b878d361. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZYXP2329767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08cf92ad1b8492da1302e93727d6216916506636843f27f21694ed1962768c76. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZYXP2329768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27bd88e6a80120f7b82fbc192851b35cd958769c4a3221ced252c93e532a3578. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:54:27Z), 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/QZYXP2329810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d76c751ed7088a80cf13043aada212ae25659ce0169e8d3b19013d3607b1650. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:21:09Z), 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/QZYXP2329811.