The Ink Spots were an American vocal pop group who gained international fame in the 1930s and 1940s. Their unique musical style predated the rhythm and blues and rock and roll musical genres, and 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 0xf86d86102803ae77a467350df7236f5f0f58623d2d9d5e9a0ab7e35c1cffa53f. Chain 2 (Bitcoin): anchored in block 954131 (2026-06-17T19:19:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7caa8265-f0a5-44f9-9f4a-a0afd59dbf65.json and https://artists.proofprofile.net/proofs/artist/7caa8265-f0a5-44f9-9f4a-a0afd59dbf65.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).