Frank Ferrer (born March 25, 1966) is an American musician. He is best known as the drummer for hard rock band Guns N' Roses, with whom he played, toured, and recorded from 2006 to 2025. He was the lo
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 0xfe0d59e7d414773c04f5e37968739b7d9a1e1ef57510a03883e5e5252df6cb2d. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f01a7c0b-425a-4c50-9785-cd4826e67cf8.json and https://artists.proofprofile.net/proofs/artist/f01a7c0b-425a-4c50-9785-cd4826e67cf8.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 0xff20310b60cff41b3ecae1724aa11b38c63be08d90869f823eb9689c795cabbf. 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/QMYW20400737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabc2bf4078448b693bcccf7bef4c724becda26ed3b3aa12e976d15bc06519f4b. 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/QMYW20400674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba631f49e07592e403e42886cb9663c1b39de6f04d151b18f82d632492dbc9fb. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GBRH31200063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d4954c571e39574515cf9dd30e5bdbfa19f5e2b6ecef0cf0f80aa2d92533450. 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/USIR40400052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bd6a133596ad45ea637d8ad8ba841dc82f9a7ac552caad1f50ffa20518eabe5. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/USIR40400053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf0ee3450638f722a99685742eb145403d7cbb45591d7d1f8b761da2caeb4eb3. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/USIR40400054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb0d35ded9d954ce75752ee3131c638d1b49c07ba418350b830e726e791f3c68. 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/USIR40400055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a4db9acfa442332c95beb4875b9c793a6fb776587769a14e62ec080c7aa0095. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/USIR40400056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x801cda3faf9484be395b7e4f813c28d9246a611a15aa8debe2ad05420b42c039. 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/USIR40400057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8f67ce1c039c9a8fa4797a73330139140eb0c44f7b4f955b5ae738060a56bc4. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USIR40400058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc08f6a09cde62b3171d34e19a5b98e9164a2e5dcc535eced82678410f4f42826. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/USIR40400059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x563ed1a54a2656a1f5cc637880ac46ebe097635cd93ea81fe36cda95027328c2. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USIR40400062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b5c262f2d4e40d160add78caade76581b9a7a47359b347877ee3511d9e953a. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/TCACE1510423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44a52743e5a1a8aab5f83ac0541dfe41cd384318a9fdc514f274ea1244966b00. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/TCACE1510432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ffbaceac24a1dce479d08af422ffc5ce9eb6245ac3926900be97f52338b0726. 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/TCACE1510435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2123a992fcfa35e7aad0fda1a972c8207a8ef52444c9a28e17e860f8771a7e2b. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/TCACE1510438.
Concurso Adolfo Guzmán de Música Cubana, Vol. 11