McKendree Spring is a progressive folk-rock band, formed in 1968 and particularly active in the early 1970s. The band, originally known as McKendree Spring Quartet, formed at Adirondack Community Col
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 0x8266bc096951652d4ee596ec218273b10eeceb55a681bcf437ef07d9e5b4d6a6. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/34ced583-7c7b-412c-93bb-1a39cebed054.json and https://artists.proofprofile.net/proofs/artist/34ced583-7c7b-412c-93bb-1a39cebed054.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).