Robert Mac (born Robert Matthew Matz on January 26, 1968) is an American comedian. Life and career Robert Mac was born in Detroit, Michigan in 1968, but moved with his family to Tucson, Arizona in 19
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 0xb602e569ac04912f09cf8c3ac991ce3d7b3be2310ba284e25f4043183c723d36. Chain 2 (Bitcoin): anchored in block 953605 (2026-06-14T07:39:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1006b632-4659-4940-887f-685a58dd88ab.json and https://artists.proofprofile.net/proofs/artist/1006b632-4659-4940-887f-685a58dd88ab.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Dry Bar Comedy Presents Robert Mac: Know More
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 0xf97bac00b2ed0b559a6c544da76d3686d75b78b31e77b9fe306e4bb503a3e58b. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZHNA1972292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cf8606d59350036dcc095403b8bff960df094473331b76b7038fdadfb6088d7. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZHNA1972293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f7c23351bb05214d6a8b4a16e1756c7b2414c3d2d01a7432ee91f3d229083b. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZHNA1972294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcd1bfe84466ccb614fa08646500e329c8afa5c93cc395f72a41d19bc5af0b01. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/QZHNA1972295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x814e462da26e0f04264b24b82dcdd4eeb4aab15454041c35044b75858c6713be. 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/QZHNA1972296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35530b9920abea51306baee91960c4901a3b9a732f872ca53ad7d45060d98351. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZHNA1972297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6cbd0e48e303add5d10c78c1e84071fabfe1bb2468cfb09c5ff7228a857a1d0. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZHNA1972298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85ad5d61a9c22178d485daa61e239a2f896778af292b8bce0b73a7f160bac803. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZHNA1972299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa32c5ab89a7d5a8e6a6828c3b2de45c8970a5faafd4c5ecc5fda9e44185573f2. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZHNA1972300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70313948bedac427d54cdd968c7f12c468e06980d5cbcf33a55282e9124338e1. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZHNA1972301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5007d5c20ed480817f2cc35687dcb6ec6db906e4829fbc041e48126b05df6d8b. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/QZHNA1972302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x974f8bc66b1cefbe8ce08a8bdecf800283a8f1589efb22213c0c113cde393e11. 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/QZHNA1972303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x178bbabc3313a512bf5e1dc25ada66e8f74ea7468afeab81e4cc6c2c109a35c7. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZHNA1972304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0154f790c521907e388a493d9f66fd9922fa3d577acea4cb98b395484c014809. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZHNA1972305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6fe1b9999eeec5b1fccefe111e40f84842133cabf9cb1484fa6c1a31c3cc565. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZHNA1972306.