Esther Zaied, better known by her married name Esther Ofarim (; born June 13, 1941), is an Israeli singer. She came second in the 1963 Eurovision Song Contest with the song "T'en va pas", representing
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 0x5df892c5d23151072c54ce90a9e683ac717c55b09251e3ff49f3f734427c4e95. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9224d876-701c-4fc1-80e4-3f46822edec2.json and https://artists.proofprofile.net/proofs/artist/9224d876-701c-4fc1-80e4-3f46822edec2.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf0f831762d27fcd799cc06f37fdb4a3f64d1c25f4913dc27a28b0d500855070. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:38:58Z), 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/IL1000001848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0f4641890ca6e6b539d976334b250b2f51de12ccca7d33f4533244c23c48d6b. 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/IL1000001851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8828fae8d9ff4a188389f9ba4b0dd1b0adace73ef477757a384511914ffd1d73. 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/IL1000001852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaefef97ac26d62c6300ef7aab4e2f70813ccab7f5c3a7ddb234488dd58fb1162. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/IL1000001854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x185ce2e19806d3f9729023299a266f216b00464be6b7313a619343d4af99f2d7. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/IL1000001855.
Meitav Shireyhem Shel Esther Ve'tzemed Ha'ofarim
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ed709c983079a0ed172255df470354db58153b09d5d27505d161c839e91e28. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:52:00Z), 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/ITDD82106734.
ארבע אחרי הצהריים ד': מיטב השירים מתכנית הרדיו
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x185ce2e19806d3f9729023299a266f216b00464be6b7313a619343d4af99f2d7. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/IL1000001855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24f4f59b94ffce2babd8b6a3ee8ddbdfcc6d441db4810e2e5c338aef3083e143. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/GBF087000580.
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
ארבע אחרי הצהריים ב': מיטב השירים מתכנית הרדיו
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x362fd5721123267ecd02b916f31dc0dfae2049b6c9bea0e8cfb5ea63b77a7d19. Chain 2 (Bitcoin): anchored in block 959147 (2026-07-22T15:43:44Z), 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/IL1000001850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd46ab24e3ea42c975c6de4394f5f5acb736194ca5e739e6d601f3638cf8bd4c. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/IL1042006413.