1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0x821e3ccd68776ee6376e5b809e6bbd31f6de2f1eae3c393e26ea4d3d07e17558. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8310f514-9c7c-45cb-b10e-0b07cdff6036.json and https://artists.proofprofile.net/proofs/artist/8310f514-9c7c-45cb-b10e-0b07cdff6036.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
{"copyright_id":"0xb5e239c10e1b729fe40ee13e7c32c85c6e2c9e8f078ca05d67a86bd7fe7c0dbf","isrc":"USBS51131186","name":"Eating Paper","registered_at":"2026-06-28T19:32:22Z","spotify_id":"7cQOWXgrLwo0Ia4aHIq0S5","type":"track"}
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. GET OTSBitcoinBlockVerifyURL → block OTSBitcoinBlock must exist at that height 3. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 4. GET OTSVerificationAPI → pre-computed 6-check result from server 5. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5e239c10e1b729fe40ee13e7c32c85c6e2c9e8f078ca05d67a86bd7fe7c0dbf. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/7cQOWXgrLwo0Ia4aHIq0S5.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/7cQOWXgrLwo0Ia4aHIq0S5.
Polyvinyl 4-Track Singles Series, Vol. 2
Interview with John Roderick (Bonus Track)
Say It Isn’t Greensleeves (A Change at Christmas)
Devinyl Splits Vol. 2: Kevin Devine & Friends