RIM Park is a city park facility offering both outdoor and indoor amenities on the northeast side of the city of Waterloo, Ontario, Canada, near the Eastbridge neighbourhood. Key facilities and featu
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 0x57de445a2bb79d134ed8846b6095ce614575d1da59280c5ac25039d9f5c4e279. Chain 2 (Bitcoin): anchored in block 954516 (2026-06-20T07:04:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a11cce4c-32fa-40e8-afe4-de24b97bc604.json and https://artists.proofprofile.net/proofs/artist/a11cce4c-32fa-40e8-afe4-de24b97bc604.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).