50 Foot Wave (often stylized as 50FOOTWAVE) is an American alternative rock band, formed in 2003. The band is fronted by Kristin Hersh, who writes the group's songs with collaborative efforts from the
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cdc0f4f5e54aab861b9c21367ae9cb641cefde930d32befd8f30cc2102bd492. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/00930c1c-0653-4962-9f71-9b07f32f5504.json and https://artists.proofprofile.net/proofs/artist/00930c1c-0653-4962-9f71-9b07f32f5504.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).