Mason Douglas Williams (born August 24, 1938) is an American classical guitarist, composer, singer, writer, comedian, and poet, best known for his 1968 instrumental "Classical Gas" and for his work as
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 0xbfced6a627c378cfb76070d915cf87651a8e27831ffe0d975909c729479d68e9. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cca1f4fd-4df6-4534-b78e-becc1444ed48.json and https://artists.proofprofile.net/proofs/artist/cca1f4fd-4df6-4534-b78e-becc1444ed48.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 0xc07c0d73696723e99fd1dfbbc518c2c6f3c0fac10bb3cbd7772f76b178008c13. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/USWB10100639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f0923e6c140edf7ea00953e90e965c2cd270a0b5868575eb15a9ef303d7929a. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USWB10100642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff41f936358400c7919748cfc1bb5624db655c6faa9459daecf6ef5b71ece43. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/USWB10100646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66dd84a6ebe6f965bb8b000af3d9fa57d1980fd3fe68dd4a67fad658d7f1f527. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/USWB10100647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70b60156d2caa805280ae48a829658714ae4e0b3d879d0413af1efb7033f0a16. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T08:32:30Z), 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/USWB10100650.
The Mason Williams Phonograph Record (Mono)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x503eca300c951096704899a65480ea25176b993cb7dee48715eb102007ed7373. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/USWB12000739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde5fdd087db8dd41c371c2612bbfc67d9b0706461d4763f16507828231a85433. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/USAG20580002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8465c87a96e260c39fc887f16232920c37dbd6e774fda8f615a4cc13f2b5e17c. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T11:24:42Z), 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/USAG20580003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd509c26126c8cba70596c5f79d6e6d7291d5f5240350263a0c864102ccac0383. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/USAG20580005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bbc0a4c81ed6156142021e0cceb7642fddc65d997bb5406fb6d3f765523c208. 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/USAG20580006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23cad51e1217be059463df5f4196945bda61ef6fd941b5494f474b0168d5fd56. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/USAG20198809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99b38daaa321c275bdf5b4d8ec31b74f0688d23d8eb293226c85d292515d146b. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/USAG20580009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x832263bcb9d1b81f224ce65141b2cfe106f7d7a0c2b6cc4260d97593ad62fb0b. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T11:20:36Z), 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/USAG20580011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe291777229300a2b6006e8a12c594267273594c06de23efbd1fd96ba39217a21. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USAG20580012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f56f4b5d62eccd265d57756ddafd267e4cd6a9c339f9e48426407709e72f27. 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/USAG20580013.
The Listening Matter (Digitally Remastered)
Classical Gas (Performed Live On The Ed Sullivan Show/1969)
EP 2003 Music for the Epicurean Harkener
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a8c73ab4f1963c5784d360bebc19327ce9f58e590e736bcef7067189263cb55. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/USCGH1048722.
Weirdos After Midnight (feat. Byron Berline, John Hickman, Jerry Mills, Rick Cunha, Don Whaley & Hal Blaine)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x323b08e912669a6d54d20cb6934685734ca4213c7e9dd93281953a3bb8af27d0. Chain 2 (Bitcoin): anchored in block 957876 (2026-07-13T16:00:32Z), 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/USHM21253581.
Eddie I'm Ready (for Love) [feat. Evynne Hollens]
Triskelion (feat. David Bersch, Kate Kahn Williams & Michelle Van Handel)
Skippin' Along On Top (feat. Byron Berline)
Cotton-Eyed Joe (feat. John Hickman & Byron Berline)
The Old Cane Press (feat. Byron Berline, John Hickman & Rick Cunha)
The Exciting Accident (feat. Rick Cunha, Byron Berline, Hal Blaine & Don Whaley)
Doot-Doot (feat. Art Maddox, Rick Cuhna, Thom Bergeron & Hal Blaine)
Cowboy Buckaroos (feat. Byron Berline, Hal Blaine, Rick Cunha, Jerry Mills, Skip Conover & Don Whaley)
Monroe's Hornpipe (feat. Byron Berline, Jerry Mills, John Hickman, Rick Cunha, Don Whaley & Hal Blaine)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeaa4067bde0aaeedbf12a2e0d2d7d6606e327273d0517812ea26898c04bdd4f. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:33:16Z), 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/USWB10100645.
The Dish - Music From The Motion Picture
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cdaafb4083488a26c93017b03d8d135c169abff5856968259490eb6936e9ada. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/US3M50122603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7890f7f0765152f56fae6742c50edf23b8f5dacb7e4c4aaa54a5ba64f974d2ef. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBAYD9400035.