alt=cumgirl8 onstage|thumb|Cumgirl8 in 2022 Cumgirl8 is an American post-punk band and multi-media collective based in Manhattan, New York, founded in 2019 by Lida Fox, Veronika Vilim, Avishag Cohen
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 0x3f5670db8846319f28c8370cc411293950cdb37fd3baedf40e8d2a89fe050aca. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/31199e01-6544-49bb-bc8d-e590e6105a45.json and https://artists.proofprofile.net/proofs/artist/31199e01-6544-49bb-bc8d-e590e6105a45.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 0xb094d2a4b9db51b341881b55eda60e2110d6c5f8fcdcb81c90d4287a7dd9f7f8. 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/USYBL1902249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfe8356f0649f1cdc953bc91942c28ba2f626e88387ff543b8e296cd7d7923c6. 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/USYBL1902250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x537f0a6790268e7d1300882b0e957e6369a95081f7b5b7c142c48c5cc88fa376. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/USYBL1902252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x262bb4e5d46ca8abdb4409b7ca7831fb4c8ed18e9d81e3c809ccd27899b94b3b. 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/AUBEC2156253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41aab153d344adc10aabe0f119508ad525a62653917089c20caf8bec17ea65a6. 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/AUBEC2158051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1132173ce06785c882f657dd9e2318d783ba05277e37fbd0e39001db16daada. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T10:57:33Z), 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/US33X2219701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf629b8c26c07f8155afdcbb2ac36433a14c6a903c976456ae288c0dc5dff8994. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/GBAFL2300253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f1f990cef7873c25c11b3215f08273c8fe6c31a2607ac0e6a44ba30e243e207. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/GBAFL2300135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe712e3c295dca4b08f59eb01b8fccff5c7ee830086056ed9f2d2bd398dce8484. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/GBAFL2300137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94e29fc52863f8f97c7a5b22508f8777d20b6fe81ef6ea76dbcb35fdb9ec7172. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/GBAFL2400194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee0e73eed2e6b43cd5becaaa37cbebef00e66b8abb9f4c3a819c7218f982ce30. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:43:31Z), 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/GBAFL2400319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee2eaeec5d351ce2297f6b4ab03e879d233712b58d526c9f46bfbdf70ab327b9. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:20:17Z), 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/GBAFL2400320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2800b71e6e38065d08726326d69ddaafa54e02f4327bef410d59e1134d385e7b. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/GBAFL2400328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x203497f79a78d3ea55929dd7e61fc09b3e9e3f7684ae15595b7b2a1ffc1d8f20. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/GBAFL2400324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7866e502e7e55574f9459131ce9c8110546f466dcfd16ee80301c9f2331179b. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/GBAFL2400325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f5ab8875f105939d0c6d6c4701fbcd527eee395cd3f0594f598c4d0f8402239. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/GBAFL2400326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f5149ed6d95e5883319534108e51e0e233db2ad24edc4cb2d12da00f25fde5. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/GBAFL2400327.