Francisco Vargas may refer to: Francisco Vargas (athlete) (born 1963), Colombian Olympic racewalker Francisco Vargas (Mexican boxer) (born 1984), Mexican lightweight boxer Francisco Vargas (Puerto
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 0x498e0da4cdbfd82f912ceb8613305df493235311a28a96a342b7a93798e030d7. 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/0f6f7003-ecb1-4dd8-9f2e-f66073219d1c.json and https://artists.proofprofile.net/proofs/artist/0f6f7003-ecb1-4dd8-9f2e-f66073219d1c.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 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 0x3e9a7f2712a46d5bdd6481013229a06d3f631d98f03adc1e4ff8747677801e40. Chain 2 (Bitcoin): anchored in block 957620 (2026-07-11T22:32:56Z), 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/NIKIT2200276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f28b67cce4e38dbdf493665d45c501bb23a057ec4bdb1abf12e612af5477fee. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FR2X41762566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2962d14759ebb791c62f87dc8d0b723b9a1e701f2b0e1d7bc961c04365b702e2. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/BRACT1606932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c7f70e76755fc5e1294bd5c559fd07488d5e68cd4e58d9fb9ecbbb7cae12f55. 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/BRACT1606933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c564ac1ac1176fba640f9b9758f744c1a5a934d21a80f047bc67b57cd4c4b33. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/BRACT1606934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca7b6ce8943814c8089013eaaa1b98ede13b8fe2ba988a11299ea5cc5f276da4. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/BRACT1606935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7c94218c96e2550d2f6e2470f071c7416226e432f1c04396d478cd3343cdb1b. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/BRACT1606939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf886b590a9415833d7afa541537183823cbe530729599404e34b478498529220. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/BRACT1606942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd53412ad0e13bf97c14a4474b24469010c17c3616393f95c6e585bb3ac2435cd. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:25:57Z), 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/BRACT1606943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84a2f34be5149fdfc987c141d7264f0970548187884c68bd004de2f3b99227d2. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/BRACT1606944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f08df40faaaebebe14383dcf41e19dd9866c0040d2492cab2f5b3e50322a5cf. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T19:24:42Z), 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/BRACT1606945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x424f693430560bd27bafbc83aafae6d4b3c43f45b22b24ebe4057e357d22989f. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T09:44:13Z), 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/BRACT1606950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4bed4f8d497d7df2adbf5e05bd8bd152839b34c60b97ab6b9d360bbc71d164b. Chain 2 (Bitcoin): anchored in block 957613 (2026-07-11T21:37:58Z), 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/BRACT1606956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07c9cb3e57b92397549dbe5680991229e92fa595b3cc9e8f5574263591288d3c. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/BRACT1606959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fa67a8187b1e16f55d36e3a42528cf73eb08f250a1dbf0efa2b95912c175647. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:59:51Z), 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/BRACT1606964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bd81c99b57d798844f91db1b5f33081ea5a51873df588c850e8b43ea512aa8a. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T21:24:46Z), 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/BRACT1606965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a1abf12278ea9573ef23566e248546cea3fc9b3c04c570932e22e631fc4d4fa. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/BRACT1606967.