Horsegirl is an American rock band from Chicago, Illinois, made up of Nora Cheng, Penelope Lowenstein, and Gigi Reece. In 2021, the group signed to Matador Records. In 2022, they released their debut
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 0xc08b0e462e21c54e851bba4ffbf36667adee5e11f24f941ee3edc1c5968c3dc1. 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/35b1ec23-3d88-4f84-8739-8b71550445ee.json and https://artists.proofprofile.net/proofs/artist/35b1ec23-3d88-4f84-8739-8b71550445ee.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 0x398ceaa6eda71c1361e485a6646917b14bd00e64f57561ef7353e697ec25d817. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:51:37Z), 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/USMTD2100678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe5f5bdf092d36a24a2153200f17d9a3b05f7cf2bdf73264891e3dc8562f8000. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/USMTD2200280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd215d05dcdf9425d80abde548a2b31a49f9446d5680e714d135ec43bd7f5955c. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/USMTD2200281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93dcbbf94cfbb70367e16ad733288f5fbcfab03e3424b99e9e8d0cf62e6f681f. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USMTD2200282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e904c12b05fe815010c8f896aba1beba14bc1f6badc2a566b12ccd8ff2c4760. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:58:41Z), 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/USMTD2200284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x625a10fb0a8006a6a930cd35611e43920755bca6ef25c7b27774ce2cffa4d824. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/USMTD2200285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf364d5902af9b10534cb2d199ac247d4562a5339f81a68974435885f2635822a. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USMTD2200286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd31d811c6ba1865796b4f1d049dcf1cd44152706e6bae334c1e2bea67dd2298. Chain 2 (Bitcoin): anchored in block 956430 (2026-07-03T02:22:42Z), 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/USMTD2400263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98887c3042c42d5bc1a1660043647bc4bb8f7258d7944b06c60841a2d84c69cc. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/USMTD2400261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8c079630f3677b4a45373c6ba7fd760342466b38190120ce0f508b2aafe91a6. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/USMTD2400264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd31d811c6ba1865796b4f1d049dcf1cd44152706e6bae334c1e2bea67dd2298. 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/USMTD2400263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98887c3042c42d5bc1a1660043647bc4bb8f7258d7944b06c60841a2d84c69cc. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/USMTD2400261.