ASTROgirl! is a teenage magazine printed a few times a year. The magazine was started by Bauer Publishing, the United States division of the German firm Bauer Verlagsgruppe. It is an entertainment mag
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 0x7f0819a0838834df5e6a6e5318bd5ee100dd59d1b55e92126332cb48983820dd. 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/746933f8-1a28-4de9-8b8f-df1498357021.json and https://artists.proofprofile.net/proofs/artist/746933f8-1a28-4de9-8b8f-df1498357021.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).