Sergio Fachelli (born March 28, 1952, in Montevideo, Uruguay) is an Uruguayan singer and songwriter, who had a successful career in the mid-1980s. After a 16-year hiatus, he returned to performing in
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 0x4440756c5a19a05a138e8ad71263e48c49120c97f6ed795b295d4fd337892705. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/79dabea0-3f1f-4c66-a94c-5ca3a4432bc2.json and https://artists.proofprofile.net/proofs/artist/79dabea0-3f1f-4c66-a94c-5ca3a4432bc2.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 0x36c31679d33c8e93ceeff3bcc9cf93f248f9b4e68ef0f9cbad69946f180a6ddf. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QM7282447871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ad89758e0a7c6dc2143db540174391a85588388814eeff4c6c700daf122231. 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/DGA082212461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6372cf1e95131288262101864e3b9a1eaf8d91ac3d34aed8ee2664e40b21f150. 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/MXUM70803612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3871215ad0651893cc56b2344b837256f0e85f4f641a4b67566cfbc84434869. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/MXUM70804902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x095d800fe3fbde902915ab2ad51f75c13cdbc34a188c676daa769ac632bbc8bd. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USJE61708024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x678ae5cd771694ed28b139c75c715cfeb50913c01399e1c9e5e904222535fed2. 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/USJE61708028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf9e35b78989b376eb2c2849c28c2a6948ca5e3a6fcefbc9bee40e6c2cee6cb8. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/USJE61708053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3a90c98b0f8a07345e2ed43d3bbc27cd084d98dcd30b8604f0e987ac8b311e1. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/USJE61708057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49001c41f9e9c66c913ee548b30dc359b41132018281bf69797cf0206e9cc914. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/USJE61708061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5361ca126b2bdc6194e8d59e006b4228dae33b01b22f578c98e347ed7ce8339d. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T15:50:24Z), 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/MXUM70803614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2651c2fdb453c690e690e3a54bf2e8c5afb3c99692afb47ccaf55945c83f214. 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/TCAEX2062855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb69e2903216ae28fc4750789e0cfbe55414782d4a6268cc5b3f542060983bf90. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/TCAEX2062877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f711939fa57cb90d78fd09ffa8f0e289ddb3ad1d997168e7bacb08ed1f17f3c. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:06:14Z), 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/TCAJF2533607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fb1bc55992aa183064adfcc1ce0bdf4879c5fd70331220818e73b90abbe556d. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QT65X2548277.
40 Años de No. 1 en Español : Los 50's, 60's, 70's y 80's
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21d07cc0b3d546c35470f0096e3d0ada85d0e8449953cc725ed5d7a363ff2dcf. 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/ES7581300501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e297a13ae5033afd4a5c0ea466569beccdd1d1cb14de0c44b7763c4c267b914. 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/ES7581300859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e297a13ae5033afd4a5c0ea466569beccdd1d1cb14de0c44b7763c4c267b914. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/ES7581300859.
40 Años de No. 1 en Español: Los 50's, los 60's, los 70's y los 80's, Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e297a13ae5033afd4a5c0ea466569beccdd1d1cb14de0c44b7763c4c267b914. 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/ES7581300859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e297a13ae5033afd4a5c0ea466569beccdd1d1cb14de0c44b7763c4c267b914. 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/ES7581300859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e297a13ae5033afd4a5c0ea466569beccdd1d1cb14de0c44b7763c4c267b914. 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/ES7581300859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21d07cc0b3d546c35470f0096e3d0ada85d0e8449953cc725ed5d7a363ff2dcf. 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/ES7581300501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b3a672695601e70e6ea1cde6701df1259709c509ebde7f09f777c6d24eca53a. 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/ES71G1865669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2532766bdce912963ac7cabf31feb969c7d8a7e19ba1de3669c6e71a07928f8. 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/ES7581300854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea0504d8ccf5f042f2d30b899795db55a48e7ebedeba4fdfc840a6322a5a934a. 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/ES7581300022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea0504d8ccf5f042f2d30b899795db55a48e7ebedeba4fdfc840a6322a5a934a. 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/ES7581300022.