Frank Anthony Castillo (April 1, 1969 – July 28, 2013) was an American Major League Baseball starting pitcher. Castillo played for the Chicago Cubs (1991–1997), Colorado Rockies (1997), Detroit Tigers
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 0xa656ea301c28fa2295cec59fe8bbb3d2d283e8df4cc41776fcbddb2421a6e26c. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8ffdec9d-96ee-45ab-9b99-9a037ea532ef.json and https://artists.proofprofile.net/proofs/artist/8ffdec9d-96ee-45ab-9b99-9a037ea532ef.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 0xb7fdb351688d51be8b125e64a2d309be33b35b9b058bb2787601af199a5687b2. 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/QZNJW2362698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x495e9ee42c1516ce94dfe1ee189cbd0b012e8aa4c71a7c22608b79aa21765862. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZNJW2362702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5dc594bb286f08d65516de8a3d0fefe6504a3a4adec139a1de9ce995115e6d4. 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/QZNJW2362699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd6fbb125f41356524eba44a80ece10e5d6f2ce8a67e22d3caef137440928d0f. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/QZNJY2408845.
Mix Karicia: Tonto Corazón/Bienvenido al Amor/La Mocita/Como el Agua Te Vas
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac5d6b0907f44862cea189c8da5bfa859693b71c22e9394c80c22062d7ceb46d. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:49:14Z), 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/QZNJY2408843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50f067effb05544beabf7ae40104bb14074aca31135603adf97acb90fc8e200d. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:41:40Z), 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/QZNJV2362483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74662595ae5279c992c43b51e69218d6ae38be82d1654f3f1cd24a1732eec2b4. 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/QZMZ92393611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6f1efcfcff6eefc25bd3a70610cbf493b8ff26ae9601440e22d43380c4e5fbb. 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/QZMZ92393613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x208cecb675eb9e3b2c28ad4931a98adcd111d53b5ee970dee323b8970cf405d5. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZTVM2352104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf44713bc09a70133ce293805a549bf38d2792e44a7d60a99a8e058839eef48ae. 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/QZTVM2352107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8576f2641f293322f5f94cdec2d09c7bc96592e35725fdddc2b1f5190f109ee9. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/AUMEV2450628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e479d4f8e7bd1288a93aa6ab81ce854dfa946f4ef7306dc562364aca8a1089e. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/QZNJZ2475804.
Mix Carlitos: Quién Eres Tú/Destrozaste Mi Alma/ No Quiero Seguir Rogando
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b41153ba08e0bae529426aea7af5442dcb7bf884eb90fb2d1a97a9d6c798002. 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/QZW9M2475452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9694cbe0bbf3a8f9206777271fca4c81306fd0eeb4bb497ba92400d8cb3fcb87. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZW9M2475453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f694ccd35b765951bf03f4be8556652fe22d043cbcab6b9841f31421e719638. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T14:37:41Z), 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/QZW9M2475454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5390c698b34a51a7084dc6d7343bb544fcb607cb6ddeb522d2d64d972feb88ad. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/QZGLS2517920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e93a4b534b74bb192cfd6c7d1c130eeaeecaefc9dd91d7b2d88f96f15d36af. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZGLS2517921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e0ebf89ab7eee609f2d7a86e15b38367ec35b4c16db3a29e7815d8d7beb97a9. 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/QZNJY2564854.