thumb|right|Tomer Yosef (middle) performing with Balkan Beat Box Tomer Yosef (; born in Kfar Saba, Israel on 8 September 1975) is an Israeli singer and lead vocalist for the Israeli electronica-world
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 0x837a7eb2346605d6a759af1952d828d43ed3b86a4c4a62a0b14ca2b207b421d1. 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/bb74bfd3-1f35-43fe-bc8d-847f24e7ac89.json and https://artists.proofprofile.net/proofs/artist/bb74bfd3-1f35-43fe-bc8d-847f24e7ac89.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 0x2b2c5a7655624199cbdd6b5b1db56ed0a0882412aa7976314f807a3ae0956abb. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/IL1041802805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf80678329ec99e731250a376699b1d6415c7b8e9bafbcae2a8348df453bfcc22. 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/IL1040600502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa54754461c5eed6a105cc1bb3ce7554bf88953237d74f8100694fc819c5475f5. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/IL1040600505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x675a8a2e01a2b24f041af441d2431b8c6b141ad11c1d39cd2b64c6248b3c61e3. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/IL1040600507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d3485088afeef9aefcd9214c779bc3f05a1afda17da7a118daea2ff34fe5cb0. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/IL1040600508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x405f60034801d8bd68f5b95815f9477815ac7e55e3ea529c4866f35de55fb1a3. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FRX452004484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7142cf2bf0ecba09adac12b64eec7eccb2bc1ce1c98f43e5a170d2f765850e2. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FRX452004485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a011a1dc08de6d5f6de031b38517069a54fe17913208e7e2aad713bbe1a00eb. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FRX452004488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a41790e8f51b834ab9360f677f3701bcd41d6d875d8b410c9c2fc6311483940. 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/FRX452004492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b9017e98a33f6ec08fe9e05def957ed567e32b693eb84fb4b8cec419683a8fd. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/FRX452004496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe074128ea8a9c5f1db9321be61e1271dba5fc8d265410f086b1590969a63d460. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/IL1041905131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed9bfbc37d86cc0b28563a5351e234c1493c187ed2060410738c0c60b7ed0f69. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/IL1041902495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5d3e950629ccf151549249781da87067bd716b17db71bb15f8075d00d2bd167. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/IL1042001104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c08d864706671f71bc4359310de465588dcc881a59d22c3a341d67e5fb1de54. 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/IL1042001106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4ab22fc6db9ae2426e1e3f99676305ef92142f1278b3d16e83d0d039f33fcc2. 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/IL1042001107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x347748a5fdb8dc706fbcbfedba639b837a70530221e5e8e4e0a0eb8685f0adb2. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/IL5002400206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f498e6e5d5fac31c9b3e530827614ed89b605a020700a151fd988169745e47. 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/IL1042004828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9903c652b5c01cb72770290976393d6fa70f0cb597866b024c0cc09c09da9972. 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/IL7532212758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0e4d09a1d0946e50d7bc8e114f3ed6decf1b43cbceeb09a2a550683f27437c4. 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/IL5842030159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffcc0beaafcbcf75a5734f4054f351a23aea42317dc1d5da2aeaf9fdcf8d3150. 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/IL5842342368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc3380f8487585d55706fffd60db3662aa64c22fee8d85016d13a67af8fdd940. 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/IL5842446755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55fff2bce96bb515f8867506b9681484520420f12f1712fde746673a56e48041. 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/IL5842446645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x786883b4ad8e3ad836fdd0e1f75499e67905b914d1c421b63a2ab8afd4e2ae69. 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/IL5842444848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb760c95616de4e85b05d93f75d2376d89cff55248d6780f89b06c7423410c563. 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/IL5842446756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e6b272add61ed1a6cedd7c546a21e2e363a1cf2cd7d215e2aad468ca9ec030c. 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/IL5842446757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc725fbf1bd2451b3e6bc53ed360663cda1ccfc95483a22caf602cd5de596c91d. 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/IL5842340483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2f6a57d563be738e1ac85c3f5c8b76212f3675219aa1013e3df42926b875d41. 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/IL5842446758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda6bccf4a17e334ce991d53d18912bb42b93498210c99da4618204b88f9cda25. 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/IL5842446759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x503cd2cdf39fee009a3c53d38098a4c1e02947c44ef1fcaea8b0354b090c3683. 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/IL5842031217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdea54c2be91598a6906826eff472362259db440d1a7bee4cd9754323273d55a8. 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/IL5842133822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7400673c55fa9842d928ad83768b8afbd1e4e66e45dabe6c6299a119e015eebc. 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/IL5842446760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc5972d8679dc760de877d84069b2cc890ec0b2d72e98757342493d919ea623. 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/IL5841720337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb11a56df45d16b94da4a0eba9607f70f0aab44613754306bd150c2a5a3f4eb37. 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/IL5841720542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e86c8238d3d95407535dce14040854ca568536565163a974de82562edbc97d. 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/IL5841720543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8447dddd325098b42eb23bcb5e56092ecb836a28d3f50903b591a4344bf13141. 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/IL5841720544.