Matthew Thomas Masurka (born May 12, 1983), better known by his stage name Gigamesh, is a Minneapolis-based American music producer and DJ. Gigamesh is most recognized for having produced Mike Posner'
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 0x3c45178079a140d79f08c2d2aace7bb99f62a21d42b3ed3136031dcd9efdfc8b. 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/cf50b036-af6c-4f34-97e5-88d402b8f7c4.json and https://artists.proofprofile.net/proofs/artist/cf50b036-af6c-4f34-97e5-88d402b8f7c4.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 0xdccfe8fb6ce5cef7f0d247144809ffaed42e6e8911c6ff032f28aecfec297567. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USVCY1100018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b17698c4778f7fb073aebfbd320b25f6a86c02efba67f46aa6e68620626ef45. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:45:11Z), 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/USVCY1100031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4766334f4095d13d360879650c1acbb0c5b88bb6383bf8bfe530c73dc2f70aa3. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/FRU701200018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5db16163c642a57fa13786f379a2225b2af40550a1fe63b9f293a0071e95680b. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USNRS1330706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x905e97415b9424ab729599f30f36e95a223786a13111fbc71c3e8945d18b58fc. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USVCY1600056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dfb8e2fe31bea2f4ab8c7e76c049f42f80b94a7d2a723d0c851972d2b425088. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USVCY1600057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6547becbe5dd8a070c059b22b64ad2559d445ec811c2b51774e49e9078df362e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USVCY1600058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80f9ed88f7b53adeebd4e74086dbb53b0fb82f06c3b83fbee5e459102e68dcc8. 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/USVCY1600059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x905e97415b9424ab729599f30f36e95a223786a13111fbc71c3e8945d18b58fc. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USVCY1600056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0854d881a8dbf198c325d57404fd0e6eb45efbf4d22dac5ede9175399fe3a180. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USVCY1600061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf928287bd2ea89ef0f21ac0b64886ba489d313605bd2040846e6f90d17c08bb8. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USVCY1600064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fc25a7a57f4d85774ccde3749121c56f23ca455ca92e08113a9f44b2ed8c4a0. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/USVCY1600066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68b8c9ce0cab6519e6a5292f85cc2824562c77be797aa7cea7077f8f8d508b31. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USVCY1500055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26b78256c799bba56b45d732cced647a130f1e9e0baafffb68f0dd438fdcb1aa. 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/TCAHS2326005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e43780a5186aa7f996da3c3dede5e1ef0b20f501497bbb42fa298adea5bfc76. 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/USJAY1000035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e43780a5186aa7f996da3c3dede5e1ef0b20f501497bbb42fa298adea5bfc76. 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/USJAY1000035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e43780a5186aa7f996da3c3dede5e1ef0b20f501497bbb42fa298adea5bfc76. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/USJAY1000035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14b938ccc5830b41170fee857cb650734dc45f2168413894df5e2348ddfb1d7b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USRC11701383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27bf26e8e4290a23e68de097d9eebd61d67a89b2de68c77843dc91645d524266. 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/QM5FT1600222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54de35ff713b80623ab34cce419661cc1da3a9b5f79cc32f057744d93ef832a6. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USRC11701680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66d751d8716ede9188e28c6cf589295ed3106a9c003623beed9b3623ada78173. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/AUUM71200383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x091468fd9c3faa2a2f8d2a85dfa91368d59b30c664b00e2aac896d4512d3312f. 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/USUG11700643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e43780a5186aa7f996da3c3dede5e1ef0b20f501497bbb42fa298adea5bfc76. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/USJAY1000035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e43780a5186aa7f996da3c3dede5e1ef0b20f501497bbb42fa298adea5bfc76. 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/USJAY1000035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e43780a5186aa7f996da3c3dede5e1ef0b20f501497bbb42fa298adea5bfc76. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USJAY1000035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e43780a5186aa7f996da3c3dede5e1ef0b20f501497bbb42fa298adea5bfc76. 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/USJAY1000035.