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 0x8f49e8c169fee6276b9ce4323c131dfaedc2a203c69372249e43adee3364b018. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4ebe4fd3-acb2-48d1-af83-fd4e30009103.json and https://artists.proofprofile.net/proofs/artist/4ebe4fd3-acb2-48d1-af83-fd4e30009103.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 0xcc5c4ea5d635c916505b1ae887c467482ca1088160e7665f39d3cc40aad4e0f4. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QM6P42226086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52b33d42ba11b1c5383024be859f4f722e4eb4e7026d5bc88836658a321116fc. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T04:59:43Z), 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/QMDA62451239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6f16acf34e3f8e43ec9dd5f18286aa3256d88823da627d197bc4c2b359b4987. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QMDA62451243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6efefebfab747a9e35977fd94623bfe3f0cf4ea02b4d89b8f8ea3caf78ce5398. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:43:42Z), 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/QMBZ92488644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb321f1a022d717203ceb7db2a4a5bab57ad42a2e1bf55212b5e5b46065f4e182. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QM6MZ2392349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32904af73608e7ec710f194e522dcde3fe67db77334b8c1e798fba0cba320adf. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/QM6MZ2508512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf794f236115891969f31351dab41a03410fcf92ef026d7d0df66ea05b725f2e4. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QM4TW2503620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6efefebfab747a9e35977fd94623bfe3f0cf4ea02b4d89b8f8ea3caf78ce5398. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QMBZ92488644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5270942c02fcde1039bf93a1632084f97356e2ead8c500a35d114e3569fac736. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:18:36Z), 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/QMFME2589978.