Mark Anthony Williams Jr. (born July 13, 1982), better known by his stage name Mickey Factz, is an American hip hop recording artist from the Bronx borough of New York City, New York. Early life Mick
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 0x459261c4d2308924be9659b86b2317806de19a8b854cd1678695de563bf9f7f7. 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/6ad571c3-220d-4525-afa7-136dff147915.json and https://artists.proofprofile.net/proofs/artist/6ad571c3-220d-4525-afa7-136dff147915.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Overdose On Life (feat. Drake & Travis McCoy)
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 0xc4075bc49da7f7f95eae95483bcb74a78eaeac8b267d320ffeedde4bb0a91a0e. 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/USJI11000111.
We Young (feat. Nakim) [Explicit Version]
For The Culture (feat. Marsha Ambrosius)
Rare Freestyles and Uneathered Works Vol. 1
Rare Freestyles & Unearthed Works Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e0cd762950b56fa6fb13032dce49a87d1424653dc7944bca25d8dc33d444f91. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/US92U1904508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5615ec7ceae0d8ffd901f00ac83cfb5b0fa5a172fa0fcfc21a2845e16ab01169. Chain 2 (Bitcoin): anchored in block 958691 (2026-07-19T07:19:31Z), 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/US92U1904801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f054b4fde9a4f505e3bb925c6a77ab5f08e9a94f575da7a69e3993efb5733e1. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/US92U2400886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb344d06692f98a0ec2bc2b75c1837d23ae0ff2b69c76e757cc780953c0bdcd8c. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:25:16Z), 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/US92U2400887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x691f42defd7084a6d223b4ccf39cfaaf5a44460b1860ddb85c52f15d16020c24. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/US92U2400889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b86adb78093c3b082aee688f373778eab35fc36644ff580da3e26f9f49bbeec. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/US92U2400890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab7fc5450ac29f6cba5cb0d585772310b3fc309367a208704ab8e664e8efe6a3. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/US92U2400898.
The Shadow In The Shade (Deluxe Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb4d4e1864ac29cd4047b1fcb1f575b4ae9b56844c6b80f880adf601bf47c5c2. 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/USDXS2201573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d54d7baf2e53cfdf248201538f6cb1abeb94340cff475aa5a43cf9a8cfcad5e. 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/USDXS2201574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dca7611b316c7b25faae371f3544c6caec225673feabe46535ac6efe721844c. 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/USHKR0940311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3daae087e6d832271cec3041663275867977a8a79a7fa94a9ccd6e93f51a4e78. 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/QZNWS2468772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cb86a05c59c3af98c31cbc4ef7af770f80e3e98d84122653053a876d03db05d. 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/QZTBA2329787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8785511966ea89daaf888356027031f9f251ecf3676c8cca35be3645eaa11c58. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZES51961946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd26d379b922433e5b65fc43be72e6f069ba5c72e2880c77d6201d7c45dc3afd7. 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/QZMER2307443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x325cd360b77dc84df0365a07f3f93d137d3ff0c312e86f37c312820adb316262. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/USLD91733921.
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 0x1cf7de2cfcdba8f4f0e9d64cefa91963eb132a60bee980e61c7bf7319a73c15f. 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/USDXS2203430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bcc9ba725ce3dd47f8e4757ad1f9469dd23fdd303f6c0228f5dee3517f48302. 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/USDXS2200575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb20e2ff27d1ef371258c901904e19ff4d3131c33dd4f0fc6fff04c8ff6f908e1. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/TCAFG2094762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc20a4088b24c9fa061e4689b4c2871698dcb7b27622b954ef9b17ab53ca04cc8. 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/US92U1911536.