Zak Smith (born 1976), also known as Zak Sabbath, is an American artist, role-playing game author, and adult film actor. Early life and education Smith was born in 1976 in Syracuse, New York. His fa
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 0xf7f5b5522134d6da645e275a82dee061fc6586ffe96266eb71b40d0b7427e083. Chain 2 (Bitcoin): anchored in block 953691 (2026-06-14T20:39:17Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6b7ed5a1-8dde-45c2-948d-fdc28f3ab4b8.json and https://artists.proofprofile.net/proofs/artist/6b7ed5a1-8dde-45c2-948d-fdc28f3ab4b8.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 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 0x64d8e477d1b68087ef0f4584d4c3aac716f4a6353a94f0de1bc2da943f1a5471. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USL4R2441686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5f37c167476f6f25335e447f7598e216218ddf35c288a7864fb5e16cb7ab657. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USL4R2480861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33ef46cabfc1f1c5279adf24a99cd05892f8de502391d94a2dbfceb163f835a8. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/USX9P2483214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2319ba3dc3f57d5cb01ba44e4b09f053347e36639ffc20bc8b4ab80fe950826. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/USX9P2490369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59674805f061359c54c6ff553dcdce5dc7a3d7f0aa595cd8316b001a44215a19. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USX9P2498449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6acea303905dcebe9888084758f0e920471ce5e89437ba90e6dc72e9c6610bc. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/USY242403040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61134530e5b7ca8a52a322b49897ce850e73849170805a27c99d4770291713fb. Chain 2 (Bitcoin): anchored in block 958668 (2026-07-19T05:16:11Z), 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/QT3TB2414193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaa65d1544c5e19949112961c83cc3d4c96e1e656b5748f7e482fb581bfd8db0. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/USCGH2508530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6fa26a39847280fa16567ee820d2404d61de07d29f516452ccffd0fb06c4868. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USCGH2508532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b61d7afe5825c9f35c9fd6c9a28805886e120f064ed44343b822f9d34ba414. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/USCGH2556389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94c1517e122034b9fd47223d4ffa14127d730ccd3453de9ff7636f912d1760a0. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USHM82506381.