Femtogo [], stylized as FEMTOGO (formerly Femt0 [fɛm.to], also known as baby hayabusa, is a French musician and founding member of the Rap collective Scarpackage (SPK). Active on SoundCloud since 2020
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 0x774cacd830fb1319c90a933ccc78d45bcf0e0de18b1910be0cd96ed5bc6c43b1. 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/bd8c89ac-948c-49e2-bb9c-08c2cfe0e3e2.json and https://artists.proofprofile.net/proofs/artist/bd8c89ac-948c-49e2-bb9c-08c2cfe0e3e2.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 0xdefc8f447abe75b461b7c6aa8cb391212f5ff965c97b49f18c2f4d61b577c311. 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/QZHN42495879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x612eece559a8aa57efc73f7385b3444159807408283756f1c79ca9fe0fbe6252. 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/QZHN42495880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x182a6cd9304e7d5c53968b3f1cdea5c3741d15862362a0b72627898c6aa9604f. 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/QZHN42495881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9ba8bd01de235e8b0cd3f31e8278c0ad5694fbc87767e5a7dffb9130f3faf61. 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/QZHN42495882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56ac2cd8443afd32ba86982fee8a078c3af6a0a720333a885032845b6960fc70. 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/QZHN42495883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42fc8588ae79be2de39940b10b7f6e296a392bd2a7819229b2ca8442b9c214ef. 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/QZWFF2354609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca823199d5e65c0c358d08aabc4504738b1763f99163db4d493bb7912406183a. 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/QZWFF2354610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ac290442322d16707bbb8ec1c859d24d138467558e9126409a16f0364808360. 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/QZWFF2354611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80c032bb8c26c2a7ea03175e7e7524326e5bfff73832df2387427a476dab8d10. 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/QZWFF2354612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x506abe3df99893a73544bab42859d5103c7364b78f1ad8ce26808ee91b73a1b9. 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/QZWFF2354613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c06ca212333ea394220e63b498d25b19c08db2ab2b2522b517ec185a0f346fb. 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/QZWFF2354614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed49ae704181d80af688dfc2af59f1399b5ea7fadb0d8bf7aabfca34ac97e90c. 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/QZK6H2395269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x879d44c4377aabde841f813d7e30cecf0a45326428b64d86a9d508ac99ea772c. 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/FR9W12317427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fec4e849a3d955bc79a0b2ee03cea1311866578357073cdbcff454c2f54de92. 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/QZPLS2278309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3e7bd95cac1a278f1c6ac15c42f05c424495d2c817975e40021c7e1067d8fac. 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/QZPLS2278310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f4c8e2bfbc1da72ff4b719fa25a79cac84cb62656584f11921140dc5f31c2f1. 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/QZPLS2278311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x154705f64909dc009aeec2b8a856a801bf1a22f0b11daa6456cb47c930ec2165. 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/QZPLS2278312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba70c4debcb7e3a4bc47f4443a19e62a5279a9028f9a34d06f27f831464b86e. 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/QZNWX2289997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x603b8a292b822a198eb437fdb7e849cfcdddc16da137d6a7d8182b48971b458f. 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/QZHNA2233300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05c7362ca1c46fa942b82e4820712aa2b977c2885e13b018ed77bd40a680306f. 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/QZHNA2233301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x942806b549f9710fd05d14aa851f7edec9c95860fca060983d7b7ed4da0cbda1. 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/QT3F22457867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b40c17b6b256fb4bf226569619535345ea62b944e0bec5d3f92020dd715de2a. 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/QT3F22457868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4a14fdc5f1bc75cf71893da94ce21ce9464e5b748310471acf7f077f322d21f. 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/QT3F22457869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96168504b7e223d87e1446acc90f5027694d8cbbcb140d83bf392f53697d0d92. 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/QT3F22457870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcf23f4fdfff8388f3da00e8598b6795a4d08b122b600ef56aebfd90e7596b89. 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/QT3F22457871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29ccf283a4268afa7630ea530c140972b07e13a124dc9301c261a2971b9fbfa7. 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/QT3F22457872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12268ae4a382e2abe960cdd2a6e53e154dd46bd734e819287dca74a4fb2b5c59. 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/QT3F22457873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80a5d6d09f5b56407dcec3e76d489ee9fd6380de8791dfe5fda15c1ea4366454. 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/QT3F22457874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe919367e8468653f6e153adbb1d39e5a207be9cff4e2f0474ad476e3f8580134. 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/QT3F22457875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d85f01257f4cff713c0fd63c501aadffa0509cf8c1e206598485b5fb0fd6266. 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/QT3F22457876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc67f9b76c20c723174251af06bf3ab326ae54757436138124b4e3019b3aeadf4. 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/QT3F22457877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73a74f7ccfbbd8288566a39bec6b30e2ffd20a25e53a58acf694f485d00debd3. 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/FR9W12526379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc73d83d0d064edd0ba65f4ae701f4537fe3a6d53f187808a3170eded2f42385a. 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/FR9W12529850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab0f0bf8d88745bcd8fcc5c58f5d1b3bd317cc68c210de3c459f3e234359545e. 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/FR9W12533565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c71e19c67c0b6481b50cefe5c2799ee9ffd194213e88f19f6001ef611d7d92. 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/QZES52561870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe47cb9b9c107b2dff9807be47c4fcc9c4220497e28e22b164079f6a852158967. 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/QZES52561871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1662a4c41a5f60500a1f3cbfa993f4190f453eafa1d8794964080bea1f1d2f0. 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/QZES52561872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6253d738662dd18b5983bc248eb0bb48d2ed4083998ef9f43b09b6c7fbd0ee51. 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/QZES52561873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59baad3563c91069975759e819b7ffb004a430ac22a61e9dd25a080e74f7d48c. 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/QZES52561874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x046c5fe2c40d53d3662eafbe375174eb4018a5409e6c8905f059a540dc09e2c0. 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/FRR642201712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a8ec1c5099246b67b82528faf459172224f6d031ce7634230d34a6ef8d0575b. 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/QZMEN2163237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6abb6eb8f659655342b6e6e274344a5362ffd01ed525fd3effe7489079c716fd. 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/QZTBB2353794.