José de la Caridad Méndez Báez (March 19,1887– October 31, 1928) was a Cuban professional baseball right-handed pitcher, shortstop, third baseman and manager in the Negro leagues. Born in Cárdenas, M
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 0x0abb96c62203858b38cce1d3757fcff9772bef33be145512fbf457ab6a268bd2. 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/abe2f44b-154b-4381-a511-860dc2f5a04d.json and https://artists.proofprofile.net/proofs/artist/abe2f44b-154b-4381-a511-860dc2f5a04d.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 0xb76007fc51aec2765d11812d2827ac40f8823628b6b8c47f7754868c18d2149c. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/SE6XW2342153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87a16cc36b13799d663bd48c56c88a5f29dac3c62c73521859f628581ff929e7. 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/SE6XW2357392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22d35099dae2ec1cce80ee8b713d57fe58724da1952ddb0775a0c1424ad67cb9. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T02:21:53Z), 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/SE6SA2368332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6a2703b286d79b296200d736208054d518b2a5086bd8b0a70fa9be45613b834. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:21:46Z), 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/SE6QE2376547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd30e14b07988c052b917fede62b2a4d9120068f1e3bc8c1486b596d0f34b39bd. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/SE5BU2456899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd26f932de214d057ec012f2908c59a9434fc2b869e8c9d523b428901b1f367c. 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/SE66N2322758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c4a4cff4e06e49b287ac892ba5d246c5464d269fa59a99eaf66dbb013d4d671. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/SE66N2311933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07f643358431c88892a36bc6dc879a2e6f437b1dfad9308787dcc552a77ecd0c. 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/SE6XX2321864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x967e91abd076c9880d469f32969b97b7bbabe56f5d6418b93c4f6bc5d28c04dc. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/SE5BU2456903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaf9dc3390d733ec99ae42dacd951ad47df78eec629afecb8658bcfee2458a29. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:27:48Z), 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/SE5BU2456902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dfa6d30c3445f0ce3531f8af265ac6ce8222cca7c2fadb95d61beb7c81844bd. 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/SE66N2327296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7258adcd4af3b66ab27ccd157069cb62cd3df2afb4ecb5dffae43822e52e6bb. Chain 2 (Bitcoin): anchored in block 958496 (2026-07-18T04:43:53Z), 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/SE5752414318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18f638d2d13a28eaaf23f57c95b69f0e6036feb5ddd3520d661e736b1be6c00e. Chain 2 (Bitcoin): anchored in block 957752 (2026-07-12T20:53:32Z), 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/SE5752414319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x003851d88f237ee8a7514ce4cd391fca5b0a78ab99cf9bdfe760442109b6856c. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/SE6QE2445456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8077172cc511124b57c57ded46e0683848062ef4c0fdb808b6b9934bc26be119. 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/SE5752414320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb155a44937d659df43a267bee7f6343a7e411aba49a4a8fe51f3e291439aa2e8. 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/SE6HN2421132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55d023ff0d1acd6099e9ff95ce4c5da4a42ff59e8cc1bf0f45e5e32f7222ccd0. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/SE6HN2427520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4ead97202e680c0d212ac43da974e290fddd5c3bf9e61a7903443d540323504. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/SE6HN2427522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a3068f7b4004fcf410c0447dcf2dae7b367dc9dc44383ea711bce511fe0bc30. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/SE5752414321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cfab5962f3dd1a64b6f66de89c148193f09fb91eb0513c4f6b44653fdc88f39. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:28:58Z), 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/SE6HN2421134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc355a777d91a418049ad75bd6c52abb8082fad685f1014b9f3e6be61a8b8cec9. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/SE5752414322.