David Nothaker (born September 23, 1989), better known by his stage name Notaker (stylized as И O T A K E R), is an American DJ and producer based in St. Louis, Missouri. He is best known for his midt
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 0x50e165b99b88355f4ba3f8cde1033206075662850c9d50c2a6202383ba977b4e. 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/2ddeaaad-e9f6-4cd8-bec2-47678abd54bc.json and https://artists.proofprofile.net/proofs/artist/2ddeaaad-e9f6-4cd8-bec2-47678abd54bc.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 0xa09b0e144af700c336d9499a4dae68836de2464ff99a7a5e3a2f562e3a1b599c. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/CA6D21700218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50757c1cf097961abd51c5fa99e62c25c66eddf7128aad3956a27c17bb57e072. 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/GBTDG1301486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb93457cbe9b4e6240127971759611918d19def652061916a345a3dec228c5d03. 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/GBTDG1301488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe24b1315d96b60cca7da6d5c59dbe4c6d6b451bd6c31b70f5f5a77a5113bf61f. 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/GBTDG1301489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c6ee8ff4de50b02af013f48c14b0faeaecb8b4c5c411237ae69024a0fa30215. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/CA6D21900052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59b59e7b5b57f9e184b0eecc6ca515f2e2c35019ca0de43bd5a1b42c41d6b1a6. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T01:00:57Z), 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/CA6D21900053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa20c324b1bd6b10d6ac166054d223a9da5b6592f6704259389e24d1cf5617d1e. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/GBTDG1302168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b25af7002e7360d3ab0640663fe25c760b595a5fc5c2e752035bb4e10007a3e. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:18:35Z), 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/QZHN52156884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0890bad0ed2474f20b88a5f594c8330cf0a9b9aa4d445c1b07a778c732ceb70f. 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/QZNWV2135733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd3deecb3dec2b13784d6249d53aea20ace9b424603070db188c43ee3b7618b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/CA6D22200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc49348cacf4568764ca785a56b5f86f94459c90daaedd4d5db007c1cb8a534de. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/CA6D22200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6eb31543d2e142cc16991fb33075401e7dad01feaec75c193840ff91905c7e7. 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/QZES72216412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd209e89d42bb0e07ea7f912503bac1b13385cb54cd512f467da3963fe814df5b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZES72229035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fed950badf05ad2eee7006ee4046301b663efa0066ac008c987b41738c0079e. 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/GBKQU2255219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x108242538dd7a71e4f29976d055b89f6d0259d18eb9bfab68d1c63e937b76b7f. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:38:51Z), 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/GBKQU2255220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24bf4b00d7547449628e14afe2dcd88a2216dc1fa231f1250dca8f96be7fac8d. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/CA5KR2259400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8e4c5213317b15a5d2a32d3b999a8879970b5271aec5f4e0af01a1a186584c6. 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/QZDA62340882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cfaa4a03b5fa30cd92ab763fae99e8f81f15f19de3ba2f1ee5bd806945b95a1. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZES92318433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7971ee527155140fd13987e82421db842228c4279e605d32ddc0afad0e6b45a. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QZRP52301788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x039eb58573d1921f10202ffa77a4c63ada524fbde3f00a3fc90d4d2888448c96. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/QZRP52301789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x256caa6da1925b7f9e3bc71381bc8ca6a89e5e7c26bb8c80ec27d9cc528b76f7. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZRP52301790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8e4c5213317b15a5d2a32d3b999a8879970b5271aec5f4e0af01a1a186584c6. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZDA62340882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cfaa4a03b5fa30cd92ab763fae99e8f81f15f19de3ba2f1ee5bd806945b95a1. 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/QZES92318433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x500796023c7ff4ee34cc514d45af006ead41980a5f2fe65a52492fd2f9408530. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:33:07Z), 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/QZRP52301792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8e101096e9cab81c04efab926f6d87fef0d1ca05325f5f8a4bee2909d15fc60. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T13:07:19Z), 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/QZMEP2349098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ac2d97a51a8b75da1e581c128a92f00b973143f9cf33973fa6aa285fe403039. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:59:30Z), 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/QZRP52301794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x254b499c8051f23ee46748e4eb164bb2e86abce1fcbba76f2d7596d3fe625066. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZRP52301795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b363f97447656f10a11f543db36765137ee086de831c1564d48a8fcf3986f5d. 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/QZRP52301796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f11ad1b2a455362701a201b6becdc5d4d95868741915bfaf8a206bae74b4ef. 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/QZMEN2499417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ca895605dc5c1bc085508a3f7532968279027f1bfed843cb4cc0fa4a06e0c77. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZTAT2478605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb88fc07dc1cca729c4baac38dea738463d453adf16073c3cd76b3acf7b729f43. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:43:27Z), 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/QZTB42489493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72c361b3fddfe1b909941eee1b1655d825a9ea1c91518268891f29734c2228c7. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T08:37:45Z), 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/QZWFT2490299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc79b1651b1f8f47781240b3ae89308b83e428ee44a0ec18039d5a83ea2e87bb7. 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/AYEYE1600036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d2706dc3c5f1cc013cc915dae558f0ea4de7ba516d19486e38a154ee4b5ae23. 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/CA6D21700149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fa3fa5e2c994ce316c1c45cb89cae0fd404ebb2f79db9e79660be9804d7c374. 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/CA6D21700205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e7071558b126d2b8743290fe7b931edc590047573c1649decd36c16936648bc. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T09:00:49Z), 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/NLRD51632438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff9b2d0586bd178aaa0f9b741bc7fdbe46a4ec2e41ff530760c70a7eec7c1844. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/CA6D21800264.