Andrew Mayer Cohen (born February 2, 1979), better known by his stage name Mayer Hawthorne, is an American singer, producer, songwriter, arranger, audio engineer, DJ, and multi-instrumentalist based i
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 0x24b19ea9b93685233dadde21832b63e55b64203852bcdb8c63313049a2225f2d. 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/45207c60-c532-4f0c-8c9e-94e2d05493e8.json and https://artists.proofprofile.net/proofs/artist/45207c60-c532-4f0c-8c9e-94e2d05493e8.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 0x843e8f983d9b9b3262290199b09733603f87e61acd04b911e6a08be55d4a8195. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMRSZ1501473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf53f479bb3ae9175e2957792b03e1ced8828a59d6b6d596a4c6c91cb24fb60d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US2S70919003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81fdec6179ca3c5b0d9730103f8efc0d5bfb76f7a171477311888dc469fc7321. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US2S70919004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3dfc4420e342d53108c3daa01f7a10dd00acc5764ab40db5c6a2fd36d9aacc0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USUM71113371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb387c9b46cf89c2a55e45ee7bd13ea43f82e4fe00ef83b2f8104dbdc63eef7b8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DESY21400326.
Our Vinyl Weighs A Ton - This Is Stones Throw Records
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x197de198be6e29b67029fffa9e38e5272b6831b8edfc479254aff6da346e886e. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/US2S70919006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d3b6e3726bfaa22fa3162219dc7b7ded188229b877c00323c582b0736e36682. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR0NT1900020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x604450a440d0c9c7ca2fa2c237f90fdeea97215663d66bd048940a78798cc784. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR0NT1900076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfcb03558625298da6dc6e83a320cb0f7e664031660babb1a5c6f2856d7746b1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR0NT1100020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfcb03558625298da6dc6e83a320cb0f7e664031660babb1a5c6f2856d7746b1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FR0NT1100020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b5b96046ae99f9b5fb1db2c386c917b31675b6fa3c9828e5b41e52af9de4d55. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR0NT1101740.
Love In Motion - Skrillex's Funkt-Out Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8547797f7cf8daa16b46a85eac578f6ba4b46ad051ce7891d8c7fd27490e5c32. 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/FR0NT1101400.
Howlin' At The New Moon (feat. Mayer Hawthorne)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3bdca54b4e05c6c785882e117db3fa4fc124f2ec0a879abe65ce901ed561495. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZUCN2200735.
Global Warming: Meltdown (Deluxe Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae7ac88c7e308bf96e2b03457fc4fcdcc051e137a6a55d823ab127c14f34dc8a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USRC11301752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c7abc379854b487d0d5665708337c6ceb374f8a61a612e1d7cd140cccfbd0b6. 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/AUUM71601143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71ba11fb8b13262393bf7110a75a57e4ff6371c426d10d34b7f80d9c0efe78bf. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBFBC1601433.
Active Balanced Rmx (feat. Mayer Hawthorne & Now On) [prod. Terry Cole]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a0fb699840a4c636689bf4bcb652cb89bf937db54d05c077e4dce9ff0f7ca6. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USACX1900014.