Trocon Markous Roberts Jr. (born November 20, 1989), better known by his stage name FKi 1st, $1T or 1st Down, is an American rapper, singer, songwriter, DJ, and record producer. He first became known
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 0x977acd915d85ebe31e962f712cc54f9e6c4538ad197417e1f2c76e09c340fbeb. 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/9f8c72ab-9348-42b3-9e87-c44318e23bf2.json and https://artists.proofprofile.net/proofs/artist/9f8c72ab-9348-42b3-9e87-c44318e23bf2.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 0x3833fcfd6b15a3f858d489de069091680628a2fabaae7e07b53dbf5f4ffe2f13. 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/TCACL1670348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc34d119623f727a180a85bedd00a5d168505e0dd4082a1d16ab183e66619f6c5. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/USZ4V1600056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65b5d280e8ee276b8a6c26e6e742a418909a8833cf0f2c81c3909e7cc53ec09e. 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/USZ4V1600060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b129dddaf2ef42608f4bb35b1dc8ec807ac1be38109888bf17b70fd8717cc53. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/USZ4V1600061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeedd343f2ae107992acdc5f483ff9b819f4abf64513add3e0e233f5f423bb65f. 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/USZ4V1600062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc40357e0a664bc7960145283b1668037afebfa666194191e7ddbdb6ce2cf7b5d. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/USZ4V1600108.
Do What Bosses Do (feat. Drugrixh Peso & Yakki)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75471ee2e06e4456cb2bdb6bc4230b37479616167fe9f77f7b9f4a6d82587379. 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/TCADB1713193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73afdfb5e00764e6e240a1906b70b17d5f423fb648292ef227890da9ab9019ab. 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/TCAEL1908866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5387e46258d9a6d99d086613dd609cb0b27c98340ab08e4827633c777e716364. 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/QZK6P2213557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8a45e64880ae179fc4d486392b4c96f21af31713449f591a3fdc30647aaa79f. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/QZK6P2213560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d9c6a44461d234407d2941e3ba607bb4395012b8c4e901b489c585e012b13f. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/QZK6P2213562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bbae4c885730f18a9d12787afe66bd7f20b763a330eab135bf9893c6700d17d. 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/USZ4V1700101.
Came Up (feat. Post Malone & Key!) - Jorgen Odegard Remix
Came Up (feat. Post Malone & Key!) [Remixes]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa2318f2d45cf15ac1b078403033b564d978f51447d55373b48bcba53d0d1c92. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/USUS11600508.
Came Up (feat. Post Malone & Key!) - Rickyxsan Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8039b3ccbe786a14db5016dd0e207cbe442becac60df3dba5f452ca381bcd21c. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/USUS11600509.
Came Up (feat. Post Malone & Key!) - graves & Clips X Ahoy VIP Edit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fe526e84e109a49fb745f9b188985b06f155f1ee6cf7008aaa4f8b8660be61d. 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/USUS11600510.
Came Up (feat. Post Malone & Key!) - Casper & B. Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x948020388dbdccb8946a39578a2bad4540b027f1552ace1b9bcaf86980647476. 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/USUS11600511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9862fb6a52dd0d2c8f7e560d0faf75ce9a1c6454a7c949d7d938505128dbecfd. 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/USUS11600316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03ded10b80c087d6059cacf0cf668f7a1ddbf3e4101fcd879144f4613d7e168b. 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/QZK6J2316295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc7ac30e60307e927f39462313f9de89b1d9107a2082509295dd7c5f36d06e41. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USZ4V1800032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc792bdafa60937282cd5130676ecb0d617d8aac7dd6017151a8d68116504a4f2. 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/QZF8N2158236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3b7e6bb5e58c19ed445a6707cac14801a847a72aa2e58bd0e9ced6fdd9dc25b. 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/QZF8N2158237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45aeb265cfb3fc97ae320e0625788e6e940ed2659fea3c2530328b362180c874. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZF8N2158238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55a3edfb73be88ab86a0092c313c846bcf8c32deb4b938b51492ab80c993730f. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/QZF8N2158239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x933f4cee73cebad1e4e011248a891556a1a52137178a74cc96dbd7249476f7a2. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZF8N2158240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x273fa1097e7f5ee305168f657a50932b525ff811c9a49d7a186c3ed63292da1a. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZF8N2158241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3ab0484cbff1a22c425fb3ef1a169442cd8666fa29082afe547fea0c4fec29b. 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/QZF8N2158244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ebbd61779230e8c6f6bd71ad0b337f476e1bf4e84e9b6cafba6451effd380f. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZF8N2158245.