Yehonatan Geffen (; 22 February 1947 – 19 April 2023), also known as Yonatan Gefen, was an Israeli author, poet, songwriter, journalist, satirist and playwright. Early life and education Geffen was
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 0x5a84ff04aae8b07be9a97b0f9408ca023f8ec5e0936b8fb684ac0551bac0836d. 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/1f3051e0-7d64-47d5-9dd8-32ca54823231.json and https://artists.proofprofile.net/proofs/artist/1f3051e0-7d64-47d5-9dd8-32ca54823231.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 0xb0aee83142429ebcce1cba6738fb14e9f10443fcdb98225d0b94f788e916c76c. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/IL1012001306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8c5b1218902a072178fb6dd9d909850af22d73d9b2521c73999d7e2d8783da3. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/IL1012001311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0d27d9213b0a64d8c016b6ea0e66491bc25a61a71deb83004d391053bc99a70. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/IL1010102097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8f464af616cd3e51060daa34ed5771be10432df6e816e2698a831d6be2fe758. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/IL1011126363.
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
60 שניות על הקשר בין מלחמת יש ברירה לחרא
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x727bf927ac58dc029f27ac0a08c52115f1cca6cfdfdcd1b3134d41cab8bedf02. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/IL1012001308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe36c8daea84962a83182dbe5da1b83d0aa2dbb24ce78fe4edc29fae4e8fd7e5. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/IL1010102101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f3c9d7dc147495b99d24dd0081d3f87725ff12440fda44dca9484c97a9af742. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/IL4291002317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x655d6e098b7d17734903c6ef39629ff2831eead4afc32b4ee3345aacf99b415a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/IL1011199995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11afd28a7ea754fb98476a23f8167fea7e22934c841a8bea7e386357b8eb9166. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/IL1010001397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bba016104af846551a1b0b26c9b699ed9a3a72bb8c4d6b47149f0f80cf6552c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/IL1010003309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11d387256063482df3f4282149433a64c53f6da3d0f09e7542c1649be751639c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/IL1010003815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc559a11a9ab71229102271e14f2af07325f919413afebf4b75bfad3d741a0f74. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/IL1010003090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2fa31cd8172d1c37f5728f904663d4cbd637e21625cc7e94018641367407181. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/IL1010102604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d5fee3fcc9f075a3b42a37a93e90154e2e6f1e2fbf93a45564c45fbeb356892. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/IL1010005198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x991fbfd1f6698143857ef9c181d3d75bdf5c1f57e8a1572514add8b03cfcbd86. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/IL1010102605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cfb76fb53c1e437c148677772cab56a5ce123c003431f84baecbdfb0c241397. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/IL1010005201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x921e3378bdf82c76049b3beb30910a0607b3f12be0ff9af89e68604c0ae27977. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/IL1010003188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7200ce52ac838795659039897780fab0134ac4af9cb9e2682eec991f4b8d3f39. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/IL1010102602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeb0b2d84d1808df77c7388cbfd179eaf03adbe324e07021d67fc8a90a8e3dc8. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/IL1010002047.