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 0xef74bc8b7324a9ff5f63ec94007e7d07af921dc5941e47c78f5de2923b3f816c. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dc2e4b91-306e-417f-836f-82ecf76f99cf.json and https://artists.proofprofile.net/proofs/artist/dc2e4b91-306e-417f-836f-82ecf76f99cf.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Catedra Del Cante Vol. 11: Niño Del Museo
The Best Collection.History Of Flamenco. Vol. 11. Niño Del Museo
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 0x6430569d47773f8b1a5b65a94097ae178b6cc1adc81a7bba697f936e13233e08. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T08:03:17Z), 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/ES5272101401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8faf3c87a687fde4b7682df06aba926bd391520ae31ae8120f916a8b56d9aa1. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-22T02:05:05Z), 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/ES5272101406.