Aviv Geffen (; born 10 May 1973) is an Israeli rock musician, singer-songwriter, music producer and author. In addition to his solo career, Geffen performs with his band HaTauyot (the "Mistakes"). He
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 0x318127d9b1df7dbc90bc8004af92ed9caffb9154a10da4ef9530f08b927675be. 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/9e2147aa-0c61-42b6-b387-7cae9d02de4e.json and https://artists.proofprofile.net/proofs/artist/9e2147aa-0c61-42b6-b387-7cae9d02de4e.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 0x041edfced6a433e71dde39b5a7cb6b2277d46a5db31d5417fe87316b36b8f948. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/IL1020204675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60657c9505879d3a196ba747c4b1c7736166279e066822ac9a8a3afd5a2484a0. 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/IL1020204199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77b06afb2f5c9e7d0fb15f3b99bdde9896333ed260e91e04217a3dd75a954e4b. 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/IL1020204725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dbdf60405b292efb2b49127b68053af42c0a26ceed10929b165379f5bd611de. 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/IL1020204722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8acbfdeca8e751246e712f3288d0480727aebd83fab63edee18815d51494b8c9. 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/IL1020204626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c5df773e43af59b94a33ccc944142270ca6f4c7c2fbd8604f8fc01bbc38eb0a. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-21T17:06:53Z), 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/IL1020204723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa881608bc408c7caaa401d1011302b8aaec16163b3d1f51ad3227110623cc7ba. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/IL1020204032.
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 0xfbee0a490ca4e3c2a1ab3f4311904a99bc8cd1f776da7fbb3ffd49948c6dea7e. 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/IL1020204721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a58b3784d501f5f106311a239e95240b196ce92be2e25566f9a570ead234ed8. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/IL1020204325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6a138e52f520bdeec1e18e396d544a85338be5bcd058812d80008b6835fe2ba. 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/IL1001089550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1913a9d8bd031ac2514a56c200eb7216f03107c17d2c1539bc48d01292d38785. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/IL1000000842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cc1b00877093566dc95aeeed9e169f3135203448d7bec809276c51e975cc7e2. 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/IL1042004818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43a04ede7ead36213d0526c47a160d0e2803baf8498d7f7579479b85399c1d03. 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/IL1000000000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fc80376f5afa60fc8bac409cda969aa716ca741e4d40bc06e7914a01fa7afb8. 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/IL1001087311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65017668f6222d3b8b87846f98a8a2b48cb48906df10c822b0961599965660a8. 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/IL1000000006.
עבודה עברית - מחווה ל-60 שנות יצירה מקורית
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce54a9796f96704dd26f6dc705f0d18fabac7d87934409965948940ea9569655. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/IL3600801690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0368fb4dee77a33ba1041b81d800295a5908d0a4cffb931309e09b314b669ee2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/IL1001800061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6933e0395659c01c0cc9fccafbbab49ea5c4fa3817a15f8390d287d0d237c99. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/IL1010993685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e0c5fc5696d6afb03b31155d0d7c086c5129bc31c1ccc1651034722ac4ccae2. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/IL1000000013.