Marshall Gilkes (born September 30, 1978) is an American jazz trombonist and composer. Biography Marshall Gilkes was born in Camp Springs, Maryland to a musical family; his mother was a classical voc
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 0xc78700068d031d981d7da00c03802fd7520ea30ab288eef28790e97d557ea123. 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/60b654d5-e424-4bbf-8552-134d8a95853b.json and https://artists.proofprofile.net/proofs/artist/60b654d5-e424-4bbf-8552-134d8a95853b.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 0x69d8ad90d3daa50fd0972bfead8c68203872fe47108d23d9a541e25a3985ae36. 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/USHM80681518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e5fbbb81724c47233eb0953b1df3a834697775466b305fdd64f877ddb2a89e4. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T06:47:16Z), 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/USHM81479726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7c659e0038cf7649a83873d160a1e30df9d0411504c30acb0353b6850c7850a. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USDY41845051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f1143c07c411ce46a3da48f27f9e3470ef9a559dc6d10ac8b0711840c4cde9c. 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/USDY41845058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc52bd69a4ee431b9fd8c77d50b5b79098668752f80e37b39eee6f8753a94be7. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T14:58:35Z), 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/USL4Q2035855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67445515e6cfd8affef8a28d297080efd9cde96ddd3d412877faa8bba8e86611. Chain 2 (Bitcoin): anchored in block 957056 (2026-07-07T15:15:30Z), 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/USHM22214368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcb1448565b8c7eaf6b210c93ac9811d775d88ebc37070ff69461ed977464f79. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USHM22214370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x728a75f5767313058dc18dcd02fbccba4d1ee3636c9761268a327307bc494a61. 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/USHM22214374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca5b99f7a81801837b9640d5909383bc8522a827b51b71be62040da2735870b2. 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/USHM22214375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x873645c5fe265a154baf75380f631cc1376359d13f4a1f11e0723860eddb2bc3. 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/USHM22214377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa046d6544bae1adca6d939c52a03349a23910928f2649018d0624125de4ba6e5. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/USHM22214372.
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 0xfafa2ac0cd7990f26b052a3b0ef53638e0fee19dae323ce5cf24e34604d0315b. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USHM22214369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dc49364ec3ddf94a96e3f09067905fb5dcef3a098a86b91a81cc86a1ec9f3ff. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/USHM22214371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a59ceded75e0adced8c32ba3f44f5d69e8aaf76ed3552a0dddf34c4c29c30af. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/USHM22214373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5a5817f6fe1909a5b5d7186375b7b33c5c458cf70c519294a772f6994b8ff15. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/USHM22214376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d63b3d77570a08091c65c7cf8df9f43f9abbb1183e988c5953a89b912bf034. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/USMH92358747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63320dd32e459e383d092ca102b0340e8442b7ef829a822b87c5b3b734cac962. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:06:14Z), 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/USMH92358748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f4125bc3f24d1ae6677103144efbcad5f0db7e874873cfdb93426427a76752d. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:23:26Z), 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/USMH92358749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x145000b3689d141b835532d034e66843b23d8b7bcb5457a0b9e0d3816400cc6f. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/USMH92358750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a2444a5d8bfd6ec140b04f670aea44026da54c041b6bbc36b7b2b36498d144e. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:16:46Z), 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/USMH92358752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a1e6c5481d38f7cae46f2e1370a35a95610ecd86ac8c1dad8300721ddeb9734. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USMH92358753.