ECR may refer to: Associations Efficient Consumer Response, a trade and industry body US Institute for Environmental Conflict Resolution European Conservatives and Reformists Party, a European
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 0xae54fce7475830b1e188700700ed7fcd7c27ce8303d44e4f65aa56aab8b155d9. Chain 2 (Bitcoin): anchored in block 954742 (2026-06-21T20:46:40Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fd781db8-a1b3-4d9b-a7e5-4ed910db76fe.json and https://artists.proofprofile.net/proofs/artist/fd781db8-a1b3-4d9b-a7e5-4ed910db76fe.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).