Advanced Placement (AP) Macroeconomics (also known as AP Macro and AP Macroecon) is an Advanced Placement macroeconomics course for high school students that culminates in an exam offered by the Colle
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 0x3a86ac2254970c47071daf34be6366351789d9136f407eabbc2288a3d46561e8. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2aec5ef9-0d2e-4586-892e-6eb6ee7c5281.json and https://artists.proofprofile.net/proofs/artist/2aec5ef9-0d2e-4586-892e-6eb6ee7c5281.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
See Where I've Come from, See Where I Will Have Come from When It's Time to See Where I've Come from in the Future