Bumble is a mobile app for online dating and social networking. It was founded by Whitney Wolfe Herd and was launched in December 2014. Bumble is operated by Bumble Inc., which also owns Badoo. The a
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 0x9236b5feb8690598ca6508acd870d8dab465adc4578ee283ec4878f5511c4563. Chain 2 (Bitcoin): anchored in block 954555 (2026-06-20T12:10:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aea78f76-506c-472f-aaf1-a49b14e9fafc.json and https://artists.proofprofile.net/proofs/artist/aea78f76-506c-472f-aaf1-a49b14e9fafc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).