José Roberto Pulido (born March 1, 1950), known as Roberto "El Primo" Pulido, is an American musician whose career spans five decades. Pulido has been recognized as a Tejano music pioneer for his intr
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 0xa0ba14074c203b04bf0b73819604c8a6edec6359b0b5010a31e4485c2a01a76b. 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/bd4e27e6-8cab-4051-9c3d-fe5ab3289637.json and https://artists.proofprofile.net/proofs/artist/bd4e27e6-8cab-4051-9c3d-fe5ab3289637.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 0xb6352380397ddafd6480192da8e564766a1e1ad562360eb9c3bc8811aec69b44. 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/USEL19000879.
Tejano All-Stars: Masterpieces By Roberto Pulido
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x810ac7809c0ff414e107c0f34912a17432dacc542e13dd9717309b6a9913d761. 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/USEL19200319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9321591b299453aca7289412e3f20da3d70fd209f5f21fa9a7f7be820e5443dc. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/USEL19000165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5bf2a68ec0eab7364e44e1ba40bc03ec0f37432f6d6902d06930c70a2162195. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USEL19300634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x810ac7809c0ff414e107c0f34912a17432dacc542e13dd9717309b6a9913d761. 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/USEL19200319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7279097264f9b630fd4b7288aa8fdc37c5da521a8925ea4ad020be0b14bc1b48. 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/USEL19600198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff285b5ff83b1c0fdc67a328b24fd669686542bf1227ef65d20f1c2a4a96fb36. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/USEL19000876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6d50ef5dbaf4c5e27c20190e178ec51b20690781b989187f7adbad022d24ec0. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:09:59Z), 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/USEL19400309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa49fd4f6b00ef1b42cbcb09eb077286998f3de80595a9276a07ea5f93aba59f3. 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/USEL19400408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4305cc49c9d246930cebd28b446a3db8afd2c6a386ad68613ad07e2f8b40dd0. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:54:53Z), 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/USEL19400404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b7dac543f7c33fb522e5635265a38a3cf5ee9fb3bc73bda78c685bfb270d982. 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/USEL19300215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9c9d2ea36c3c5cfaa0f153705dad537f7aa62dbefd076a51f20e85f130696de. 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/USEL19000875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6c029fd74cf4387b3e11ffa8fe427df44f009ee83c868fdb2e2e036c9b3b520. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USEL19500248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c5f47857a36a73d60380139cb92e6d5798b847464edb7885082ca12d04a2d3f. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/USEL19300050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bfc1f7ed411694041bae8dfd9dd8c1dcdf52b38d3e7fa65b26be5f1b68072e2. 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/USEL19500245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe3cade1387f70ac49d78f3118ae987684ae402c336a88c4fc12dd2fc11d12cc. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:56:49Z), 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/USEL19500302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ae583d0e0337979a7dce46c4db8d6be2fb62797aab018b368f3b3d94f8cb2b8. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USEL19400403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x666b075442d3cca671194234d8163c23ab240bec90a68b569f4dac2702fa1c28. 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/MX2971601245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6548ceb4eed36105294105312bc5a9038ffe344cc80bd5f6a275dcf0c972c5d9. 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/MX2972001996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bfc1f7ed411694041bae8dfd9dd8c1dcdf52b38d3e7fa65b26be5f1b68072e2. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/USEL19500245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa49fd4f6b00ef1b42cbcb09eb077286998f3de80595a9276a07ea5f93aba59f3. 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/USEL19400408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2983e342bea11db09ebbc342208e6cb257491ad04eacac14c8deaee168be776. 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/USEL19300633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa49fd4f6b00ef1b42cbcb09eb077286998f3de80595a9276a07ea5f93aba59f3. 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/USEL19400408.
Serie 3X4 (Roberto Pulido, Elsa Garcia, Ram Herrera)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bfc1f7ed411694041bae8dfd9dd8c1dcdf52b38d3e7fa65b26be5f1b68072e2. 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/USEL19500245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63e1d33a5f5f887c120bee5f72e28664562a0ad5749b46e189584ef55b72608b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USEL19400326.