Irene "Rena" Koumioti (Greek: ; 3 May 1941 – 3 April 2023) was a Greek musician. She also appeared briefly in film and on television. Biography Koumioti was born in the Nea Ionia district of Athens.
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 0x90fb7d44f6f263b08f5fd3b1fa97c9e885fcf56d43ea0f79a65b893499266ea6. 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/44f1f48b-1942-46d5-808c-808708ab2c3e.json and https://artists.proofprofile.net/proofs/artist/44f1f48b-1942-46d5-808c-808708ab2c3e.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 0x988e56faad189a4dd1113129f21ec930c05e13009b17ace9946fee05a81c8f1a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GRL010700137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3063cc8dedcb43475b7f09f7518dd2735059f0e9bfbf78f4b6eee010c18a69fa. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GRL010700139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc05b822b9124f2e4ee02127dd7664b725bd2a59665a6351b86f5b76a8666d188. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/GRL010700141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eecd57879aa2852b36413d91e952e6039a5f7a2c016bf4bf5a3732684a4c2ae. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/GRL010700143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbad0304a95e92a1cfbbde2f2d8d8c1ebe32f06e6fcc1edcc0212fda59dea061b. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/GRL017100062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x216a297408ca5338b7bff40d432fe7c5c1bcc08274f823c16382299ebe438d33. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/GRL019500636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbc464474f8c21bec7880be93087f594cc1bff4e5d869aaa74b7bbe155b411be. 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/GRL010700131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f5a47f2f2cba327da95935bf682b64e689904e7c655e4a4d6d6cbb184533ca6. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/GRL019500626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a644c1102531b59eba3e90c77d771ebc1822aa091c9980d1f07562ae6941f27. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/GRL019500630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6020f2549811c02a6538c3d3781944744eca4af59deb53587f324c5de839a80f. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/GRL017200054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb443ee8999806214a5b6785f28762acb26de98b0dcdd32011946c9092372432d. Chain 2 (Bitcoin): anchored in block 958658 (2026-07-19T04:09:09Z), 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/GRL017000271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecc1f1b5daab176aea5d71136084319750dea6beb302817d1a4f71c881a953fa. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/GRL010900977.