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 0x90886447663e1d411277f06df029d6b105f4d26327b1f3faa1fe61ccd205d6ef. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6e781c0e-b699-4393-9e3f-5bc655826ca0.json and https://artists.proofprofile.net/proofs/artist/6e781c0e-b699-4393-9e3f-5bc655826ca0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Pepe Vásquez & Abelardo Vásquez: Desde el Cielo Le Cantan al Perú
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 0x94fa8f1cd4a0ee4819f4ba9e48c3cecf92ac06ba4f8ab26da5ebcd1d0f1bd00d. 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/PEMG99907001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e4ab632fa57eb90f405999d32db74cbf635baf62226b96c72a9df71a4b74d9. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/PEMG99907002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18cf3a9d36dfc97267e0921db0b326074be3a59ac17c41abac8c5825ab85815f. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:11:17Z), 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/USRAR1001068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae6129ec69de4d36fac91fe3a8e9e4432a349ba5936cc73a24d6e74b8d3ba0fb. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/USRAR1001155.