"Blood on My Hands" is the first single from the Used's fourth studio album Artwork. The single was released on June 30, 2009 via 12-inch picture disc vinyl and digital download, and began airing on t
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 0xb8a68835f59291f2e616d498b69d76efbbb16f36bdf756d419d123ac51e3102b. Chain 2 (Bitcoin): anchored in block 954014 (2026-06-16T22:46:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/33fe3a40-5307-4de4-94b3-075b976089b9.json and https://artists.proofprofile.net/proofs/artist/33fe3a40-5307-4de4-94b3-075b976089b9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).