The Brothers & the Sisters (, Ha'Achim VeHa'Achayot) was an Israeli vocal group active between 1971 and 1983, with reunions beginning in 2003. The ensemble consisted of four singers—two men and two wo
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 0xe81ff39724e14e588f303f82c77177e8cca16ca4a91f7d3590cfeb3ffd46eed1. 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/c64f41f4-af90-418d-9f46-75e4199202d7.json and https://artists.proofprofile.net/proofs/artist/c64f41f4-af90-418d-9f46-75e4199202d7.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 0xf7316c6f3d2d3252338aea003842ae9675db4bca7a57eeb5cc784f268765ca44. 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/IL1011097932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce2467f897732abd2f118dca8334c8abeb0564d6e45194b86016b6503c349283. 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/IL1011098000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3188f471a14ed636f9903515a1f4a50b1e76dc63529bbf88e1654b81fb32ebc3. 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/IL1011097908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe19eefed40c7b2c66c4b00423096cfc0e31127879bba2b227f93b93410b48ede. 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/IL1010001088.
ארבע אחרי הצהריים ג': מיטב השירים מתכנית הרדיו
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f4c8a4b29c1ead29dff121ceda48b24d7d5d665ac01771df7b4af3b637f9e27. 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/IL1001086675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf558c575d5d734a52033e974b9fd32a8aa097e14c97c73066b77ca6701cae31. 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/IL1001086673.
רואים רחוק - השירים היפים של שנות ה-80 (חלק ב)
ארבע אחרי הצהריים ב': מיטב השירים מתכנית הרדיו
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b95460cc1f62bb7136084dc0cb9fe2e4d145cf4e3134818679ef5e4cc16b577. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/IL1010100461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1234ccb481c6cf30335dc366cff93deac2712befb671f59d1238896dc39b74e. 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/IL1001087316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x674a14919a765b79263ffe96da52e38bd944f5288a7144dbfd558e30d598a106. 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/IL1001900785.
מי ידע שכך יהיה - השירים היפים של שנות ה-70 (חלק ב)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c006c5ab662e0e6d9e67fa6767308ebbad1a645242ef88d57ee487ba5e2144c. 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/IL1010005808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8c1b6b1e9fd02fac9a2c2ded4fc1b3bd0494c52450d68eb7dd6600e9020846a. 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/IL1010102434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4557ec0e42871ceee857df5ad39009e0911027ba9ae62cb9cfe46acdce582892. 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/IL1001085541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e6fe8e7ea38d2a3abaa806f871f9a35ab7a25976167828c66bc0603ac095aa6. 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/IL1010000162.
המנצחים - להיטי הפסטיבלים החסידיים 1969-1975
מי ידע שכך יהיה - השירים היפים של שנות ה-70 (חלק א)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3b557046d9048be1378d4858c512e83ae5db8368575cd126bc22b0b65005af3. 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/IL1057600009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69884310ea827636b7b129c9a4aec130069eed5694c0ebc3c639c80607101628. 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/IL1058100038.