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 0x52093e08b82f381711b667d10335f197700507c6a8f8bc750ba24be1725c54b6. Chain 2 (Bitcoin): anchored in block 953812 (2026-06-15T17:06:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f6497431-c9c9-44e1-b6c1-b4ee45709f62.json and https://artists.proofprofile.net/proofs/artist/f6497431-c9c9-44e1-b6c1-b4ee45709f62.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 0x93021f98ca6d7eff1084b314117e2424f9b6f503c6e50ab17d9810e8f8bbf3c5. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ES8261423403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86385ee7b9dca14d5aee8e0e0a20b32e7bb70545cd1586b921b501ae54a837d9. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:42:04Z), 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/ES09S1700360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8037ad64059bfc9e5b6710e8d606f4469aa84d8aaa5e2e5dbd922ea3df111b0. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:04:32Z), 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/ES09S1900026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9f241bf908f8a50257902d2387f7351a977082e0a93b802d435864efc369681. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:01:27Z), 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/ES09S2300136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf03641cb8e28fcc50a24715a31ed8c9d367f99594fad57f9ae55171a3518cd70. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/ES09S2300137.