Roberto Pacheco (born 21 February 1952) is a Puerto Rican judoka. He competed in the men's lightweight event at the 1972 Summer Olympics. References External links Category:1952 births Category:L
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 0xf37dcd4326fb2802ed618bfb45799618119faa6425c8ead122745c84733d8967. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c9f02794-10d8-4a27-afe9-2f5ecde6c3f8.json and https://artists.proofprofile.net/proofs/artist/c9f02794-10d8-4a27-afe9-2f5ecde6c3f8.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 0x035267a8abf2ab13e32bfb4dd06ea7f5512f349fc54fcbe7437d251091bdc597. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZ2J21504953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd72f578ebb7dbc1040edcbf252c341b50dc89b87b28713a2c0151e664239077. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/QZ2J21504954.
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 0x14023e19bc5e23bfcf64fb706879292b4a25e5665f68db74c990a19338dc953f. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZ2J21504955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc8364d4e5c734dc5c38ade98f0aea3900fb8ac7bb947d28c18d3eb4af7d3e61. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZ2J21504956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1368bddb83c14f5c9d505cca34a99fbdd0d93abd1592c7568e2555e970803974. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/QZ2J21504957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d6de15ca524dcf4c72cae43a95324bebb04109c796ff7374530b0a19ee3e16. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZHNA2160686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62d055fbbe48a6d00a1509121d8dab0987588cb03fc9a007d2dcb2fd39ef5300. 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/QZHNA2160687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bc9ba65a2033f2f56ff1d866deaad880876de0453fad8a404c45bf01c84fab5. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/QZHNA2160684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e4c823c8134840c7b7f435339a447fa576683cdc9fd4f1f480f177ca7b35b0b. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/QZHNA2160685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45992193e9d54d180fee0e0825f03ff502b978a46bb5a9dc21560f90980c5f2d. 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/QZWV32442020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3d1fbd872e82c588773a7542a7150ad306529a7ae17d79bec6aa0efaeb43e5a. 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/QZWV32442029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e6a0a91f63cae58752379263bb85a0201723b33528d2fe18cee5030be7aeca5. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZWV32442031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a328dacc1269d400e3035ccb31834e7ce009f1a27051a611d80f79a6fd4b7d4. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZWV32442041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae751a49528e09d66208a7cf777ce4e28f09c44dd7455d415ea6826826cd44c8. 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/QZ2J21507482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d22e2852c88c9d6f8eb145dfc47de676d91213d8d270fe70b6a10eee18a8d67. 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/QZ2J21507328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e4cd79670b8518f705f6d936b8d95993223031f3ac0364a5de077e0d927e5d3. 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/QZ2J21513068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x659fa66d34b71401feb20fa0a73e4762ec9558c8a728edf2f633d94006591fcc. 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/TCADU1875883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffbe6af89c43b8a1e0146c3ef2332d8e36f8d87871c93b320023b6cfb37f4fe5. 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/TCADU1875895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75e30b8cb386455217336f32065626e5a2c3c698168cfd7d2e942b5ae37b345d. 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/TCADU1875886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ee95805091fc15991f270a7bb5a7ff02f0451462d17067cec6a049f00f6ae1a. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/TCADU1875892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f96d8b82d63510a56d04ea62a3fe28c7b20f07b6f6f1c56d013a28778100b47. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/TCADU1875897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74b69fb6c3e7e3ad1b9e0afc199213ce770c6099f5573f32ab2aea9f87613b91. 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/QZNJW2441335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f5c5a29aa95243a792147905a92c850d3a7ae561b725312efa2844eb2ba709d. 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/QZNJW2441344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12427b0815fa1edf81bfa794970aa1bf6beb9c16772bc54e88b916ce8a72d9d0. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/QZNJW2441345.