Guadalupe Rivera Saavedra (born January 30, 1972) is a Mexican-American singer and songwriter. In 2010, Rivera was awarded a Grammy Award for his album, Tu Esclavo y Amo. His older sister was the late
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 0xc1c71955d05ea0b73901028a7e51b12fa77160e8f5a53ea7fbc1cd18a15c949b. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b6578708-f79b-4b78-a4b8-5c63b28ec0ff.json and https://artists.proofprofile.net/proofs/artist/b6578708-f79b-4b78-a4b8-5c63b28ec0ff.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 0x9e3c07b4a9621c4f042124f13355911e7ae398dba3aa37531bed89562c3ab327. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZQMB2103333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba755d671e775057524ca917d63737d7ba598880fcfc37d0ab5ee1fa393451aa. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM6MZ2143141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9d6326e539045cb31e04230cb458d2677bd141ff0eca93e53341592169cafb4. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QMMQW1710173.
Aunque Mal Paguen Ellas (Version Mariachi)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa60f4d056d4317328b7a89d1955c0640046e9887cf8ad5c4bffcf1babde97cf8. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QMMQW1710174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x874f668f61a8a7c01162b89a47b1b83ab070a98f4f983e9ca4858d950b309a5e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM6N21762203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac86f4e99e0ad2a118c164a6e258aa7b1b0e68bf5b546638f1e7bd061bc02640. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM6N21762205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab9efaf6c9b99ae7e0aa21a8bcc3c0b51c457689ff39fc7c7562022bac2ade9a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QM6N21762206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdd238f7b580b3726875f6120bbf45ca105285976ff0ba1f23b4bf16d670e800. 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/QM6N21762207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea6d2e76ab450e7caf2f8b883213d32e702a4aa8543c1dd47eb2b61f62731e64. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM6N21762208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf15874d2743c3dc1fbb3d43c2cc44844a91bd3dd745365e3282b8ad415d3b942. 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/QM6N21762209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c821ff07e6f983aa66ba29e0eedeadfec8b889ec0e64c37eec81f61b20a50a. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QM6N21762213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5052e80de184f9be9a52bd5cb763c26826401c16d77711b643a25e2a9fe55143. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T20:55:29Z), 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/QM6N21762214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x896c2b16c7c3a32edb197ca0c143a447b8f56c54abefc32822ab0155533736c1. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-21T22:45:37Z), 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/QM6N21762215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8684c0f9601a67e34f1b312948261a1db045b288e9e3d004d03c2aa2970065c2. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QM6N21762217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe395a77d139fe42c06b20958473f6fbdc1f1bdb578f85d5cfdc6ac60b08a879. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:46:34Z), 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/QM6N21762210.
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 0xd59d8754d12b29bd3003afb5a08747a782281b768741d092f349d520754bbdee. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QM6N21762212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94cdbf9cb6e5732bb67ec28cfe482cd1a69818a49ca62c6384241365613b9222. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QM6N21762204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d8a2b62a741730b5a687f9567d8a0ecad4bbe21d26e493f3ad41609d8c94e9b. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QM6N21762211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aa36969f5cf9e7192dba464bb4ea22d7ae777458c71ffa72661e94b8b8e2c35. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/QM6N21762216.