thumb|Giorgos Katsoros performs at the Grand Master's Palace in the Rhodes Medieval City in Rhodes, Greece on July 17th, 2024 Giorgos Katsaros (; born 7 March 1934) is a Greek musician and songwriter.
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 0x0064f2b693fdd379772607db9ef35fc19da97fee1b96cbe0cd7b312bb9bdd7db. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2371fd5b-315e-4d39-b45d-bd03708a05e7.json and https://artists.proofprofile.net/proofs/artist/2371fd5b-315e-4d39-b45d-bd03708a05e7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
O Giorgos Katsaros Paizei Giorgo Katsaro
To Chryso Saxofono Tou Giorgou Katsarou, Vol. 2
To Chryso Saxofono Tou Giorgou Katsarou, Vol. 1
To Chryso Saxofono Tou Giorgou Katsarou, Vol. 2 (Se Magika Nisia)
To Chryso Saxofono Tou Giorgou Katsarou, Vol. 1 (San Ki Apopse)
To Hryso Saxofono Tou Giorgou Katsarou No 5 - Den Yparhei Eftyhia
To Chryso Saxofono Tou Giorgou Katsarou, Vol. 3 (O Dromos Gia Ta Kythira)
To Chryso Saxofono Tou Giorgou Katsarou, Vol. 4 (To Feggari Kanei Kyklo)
Ta Spania Apo Ton Elliniko Kinimatografo
Rempetika and Folk Songs (USA Recordings1920-1950)
Htes To Vradi Stou Karipi (USA Recordings 1920 - 1950)
Giorgos Katsaros Saxophone Instrumentals
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 0x75d3feedb426e526980596cd4c527e966d4976da2859188b19fc06d22722e10f. 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/GRFM19600030.