Kevin Blackwood is a professional blackjack player, card counter and gambling author. He is best known for his novel, The Counter, and his instructional book, Play Blackjack Like the Pros. Blackwood
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 0x43967c31f1ef1f84b618f7b504d9298e2d83ed306276d2c2a9b955068834e62a. Chain 2 (Bitcoin): anchored in block 954659 (2026-06-21T06:14:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dc0dc0e8-c036-4e6a-a63d-9afd957e9aa9.json and https://artists.proofprofile.net/proofs/artist/dc0dc0e8-c036-4e6a-a63d-9afd957e9aa9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 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. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f873918fe9a28dd9aef501a1e70c7194e4e892427871e97b85d5425670c65d6. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:46:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZDA82440967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x715783b8edf8f9f29937fb6014e8884785d1bbef9ab740325bd8a0af3eab9d5d. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:11:22Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHNA2414759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87943dcfaa35bc9c47c5dcbfca066d9fd48cade3f89df9a001ba38443fc6805b. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZ782423053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee966a9ae815404f39551cecbbed294c5f93172c33e961bf337ee7913675349. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:50:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZ7V2461492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9149c5784cd610c64b97f6999f2c54fd316f1160cd67a1c6684728bad8fe6dd. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QT3F92573879.