Rafael Méndez (March 26, 1906 – September 15, 1981) was a Mexican virtuoso solo trumpeter. He is known as the "Heifetz of the Trumpet." Early life Méndez was born in Jiquilpan, Michoacán, Mexico to a
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 0x08e65f7117d2ec8408ebff41f6f8be74a7d700b702ced3d40a2a87c2d9dc427f. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e4663ac9-9ae0-4d9f-b847-3e8b4fb4afa5.json and https://artists.proofprofile.net/proofs/artist/e4663ac9-9ae0-4d9f-b847-3e8b4fb4afa5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Rafael Méndez y Su Orquesta (Remaster from the Original Azteca Tapes)
The Legendary Trumpet Virtuosity Of Rafael Mendez Volume 1
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 0x0bdc8ac9db609f5b45b75f4e4b735b786c51dae14875ec9f62026246ac4aa7a4. 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/US9930511337.
Armando Manzanero In Memoriam (1935/2020) [Instrumental]
Trumpet Magic - A Tribute to Rafael Méndez
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c93361d1e41e268fb8877aa8e3cbe3f19300b980861e68e91e86824df751efa. 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/CA5KR1809082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x798acde9522ce76625bcd7f1d757568ff73d33b9530c4a5da672cb98a39f84e6. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/CA5KR1809104.
Rafael Mendez: The World's Greatest Trumpet Virtuoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0379d60214c7e62169791d18fb24195b8b37580b4f33f23a959f1f4a14f454d6. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/PEMG91394007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3836d56f67027c4c771fa01da77e57cd9712102107b11c6f086a2a67ecff8ef9. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USRAR1001184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fcf3882978fa04da1c67b60eed87cb3556b0f230f13f3bf3200298bc203e247. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/PEMG91506011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x819bb4969a458508d9ddcbbee33bba4f3f7c6f51fa0f3b7707bef84fe2d3b4dc. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/PEMG91394003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x799b494b7049481a9d3ad2863752e2688569bea5ce3e0c0afb298403e1ee5c3a. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T08:37:45Z), 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/USRAR1001188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5ae8d32d3d35067f4e4932837d9182173d86cd93e7dd8fa7f43f0c46d60f815. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/USRAR1001195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8912f5325560236594ed730f8560d14236c81230137fe5938a35351f16fc575a. 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/PEMG91394006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9ef5833dfeae3ae402c249c3d34e3d41d549fe87905ca5250b02451a5482ec9. 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/USDY41942080.
A Celebration of Rafael Méndez - Trumpet Fiesta
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce2124920d6b161bf315c3ff794d5c5562c3dfc0a3fb704ec1ab3af67fa1137. 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/US9931200069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ee9ac7a5002bcea899348c990b4652b020276d831f247a58697be9e943d2ee0. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/US9931200070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dd616e8bbf427936b8c5ece689be98188453b1e5069184f751e3eb3cb0dd51f. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/US9931200071.