Tronco means trunk, torso, truncated in several Romance languages. It is the surname of the following people: Cristopher Tronco Sánchez (born 1985), Mexican swimmer Louriza Tronco (born 1993), Canadia
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 0x5b1fa07f7edb6041482cd608bcaeb1c2660ba9fcb999c3e50d7be33939266e33. 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/bafd999e-e7c1-4ea4-b2e5-ffc705d40347.json and https://artists.proofprofile.net/proofs/artist/bafd999e-e7c1-4ea4-b2e5-ffc705d40347.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 0xcd65992ca208852b93abb8b335f5c5a89bda016aac6974a526f827dd6f366496. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/ES6641700050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd65992ca208852b93abb8b335f5c5a89bda016aac6974a526f827dd6f366496. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/ES6641700050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2829da53cd99f7a6536e8cf1ccb567f50cbf822e225135be3c4dd2367c5985d. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/ES6641700051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42b6ab88885c37b8128c456b1038240ff0d4c2d017f80307caa85803f6a6c0cd. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/ES6641700053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65224c776707b7ea851f767a86a9f59b100d77ef3f189f8a7aad8bdaead04f2a. Chain 2 (Bitcoin): anchored in block 957564 (2026-07-11T12:19:47Z), 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/ES6641700055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1068de84871bc9e9cdac549314ef9ffd6153929241b14e10741d70928f6eb1b1. 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/ES6641700056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7fb264da0ea834d442bf481078ccbc258f48eaf34b8deda3304b4fa0a75b5f6. 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/ES6641700057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e75331fc28e6317d77f99247cf30393d0e79e999f489a2aa250d27d741bee4e. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/ES6641700059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe37cad2419c9d017799c2a65a95ee9656bca3cdb9fa6760446da224f61527596. 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/ES6641800162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd55cc0c86cd9dde9938afcb87ec12b4451f8145784e9bbe8c5867e9f644a93a2. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ES6641800161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30f1f02a8294da48befa5eac943c51078cc4d75dd0a0b2eba4f5fc98a511b875. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/ES6641800166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf869d1cab83f0b6bf05e26375a355c5c099c968892b21e727eb1bc21ceddc413. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/ES6641800168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef45648b86600576605ba1007c8cf02a55879ba822690570d8d97eb2b30ccadf. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/ES6641800171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2afd5d51b4be0c5a8b701fc4bc511ec0419e16c224ad88734bce045c7c45405. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/ES6642100035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95956f9538e399fa48aeafb7d3e422dd014f25532c723e6288391fb514f925c8. 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/ES6642100037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73a9588d85a1dbd1316192b8c40e38dc1d81df59857110d803c7e8c330bd1bfe. 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/ESA092321649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cc2d5bca09ef8c368782cb71fbeed5239962fd4d86906c62e54c27a237c337d. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/ESA092333061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x178b2033bdcff8196a4073379af7eb6356629c9636d977475f320739023ae2c7. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/ESA092319026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27f2c4ddce141883b632bba75c54fb43a752aec1dd55a05b99fd13cd6ec10751. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T20:19:31Z), 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/ESA092332021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bdb7f3b6ac923223d03ab3baf4ed16e558eb90a3c3e9439ccc8155566d79ac6. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/ESA092321685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18a1b85c1600359409f763853f6fe633973144439fed4d7a1cdbd39303ce60a6. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/ESA092320200.