thumb|upright=1.2|A Philips soundbar thumb|upright=1.2|A typical soundbar setup, placed centered in front of a TV below the screen A soundbar, sound bar or media bar is a type of loudspeaker that pro
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 0x31d3d2077052d8e6220b69d402f6b0d5a4ab1cf67c9a83bc4daf6a98a51108da. Chain 2 (Bitcoin): anchored in block 954004 (2026-06-16T21:01:04Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3277110f-ae8c-44f2-b7e1-6d053e62d427.json and https://artists.proofprofile.net/proofs/artist/3277110f-ae8c-44f2-b7e1-6d053e62d427.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Sounds and Color: Uplifting New Age Music