thumb|right|150px|Rita Abatzi () Rita Abatzi (also spelled Abadzi; ; ca. 1914 – 17 June 1969) was a Greek rebetiko musician who began her career in the first part of the 1930s. Biography She was born
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 0x7f6060573e0939fc5314ad0faf6676bace393f9d0ae8d0902779efdae9c4b39f. Chain 2 (Bitcoin): anchored in block 953727 (2026-06-15T02:33:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/908b548c-94b3-418e-9cb9-33cb1480e7a9.json and https://artists.proofprofile.net/proofs/artist/908b548c-94b3-418e-9cb9-33cb1480e7a9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Rita Abatzi Recordings 1931 - 1937 / Singers of Greek folk song in 78 rpm
Rita Abatzi Vol. 3: Recordings 1933 - 1937 / Singers of Greek popular song in 78 rpm
Rita Abatzi Vol. 2: Recordings 1932 - 1950 / Singers of Greek popular song in 78 rpm
Rita Abatzi Vol. 4: Recordings 1933 - 1939 / Singers of Greek popular song in 78 rpm
Original Masters - 61 Amazing Recordings
Dervisis Kai Rita (78 Rmp Recordings 1932-1934)
Varethika Ton Argile (78 Rmp Recordings 1934-1937)
To Pasoumi (78 Rmp Greek Folk Songs Recordings 1933-1939)
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 0xa45c20452ba6832c3543ba5f7485fefb4622d76710afce5fd93d62c545bf9ef6. 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/GRE018500626.