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 0x146258ecce02ea05b5b65ab16d51898332d75e06756c4147f72790a4ab8d8a79. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/98d2fb36-7fa6-4070-a855-7c13ca72f7d8.json and https://artists.proofprofile.net/proofs/artist/98d2fb36-7fa6-4070-a855-7c13ca72f7d8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Guitare : Grands compositeurs argentins Abel Fleury, Atahualpa Yupanqui, Astor Piazzola, Eduardo Falú
Música Argentina para Guitarra - Folklore / Volumen 2
Argentinische Musik Für Gitarre / Ausgabe 3
Música Argentina para Guitarra / Folklore, Vol. 3
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 0x0c53f9bbac0f531a02ae3db7f18195995aa03f9a66b16a60a0459fba14359cf1. 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/ARZ020801374.
Argentine Music for Guitar - Folklore / Vol. 2
Atahualpa Yupanqui, Obra Completa para Guitarra: Versiones
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48e0f61e0827b7e5c49d8875f01cdc9dda6a8142caaa74c533653e1ea1979fb0. 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/ARZ020801381.
Atahualpa Yupanqui, Complete Works for Guitar: Compositions
Carlos Martínez interpreta a Eduardo Falú Vol.1
Atahualpa Yupanqui - obra completa para guitarra
Carloz Martinez interpreta a Eduardo Falu, Vol. 1
Carlos Martinez interpreta Eduardo Falu, Vol. 2
Atahualpa Yupanqui: Obra completa para guitara versiones Carlos Martinez