Atar Mayner (Hebrew: עטר מיינר; born 29 April 1991) is an Israeli rapper, singer and record producer. Biography Mayner was born on 29 April 1991, the eldest son of a carpenter father and painter moth
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 0xbe7a0831967c8bc9d4b20c5880a93198f5856371f9f27b60a61706867ccf1c19. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/37d55760-aacb-4745-84c7-a0e8719cc045.json and https://artists.proofprofile.net/proofs/artist/37d55760-aacb-4745-84c7-a0e8719cc045.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 0x5ddead51336bb8523c634ce3834fabafc943163c427ab30a459b69505158b120. 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/IL1021810602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33b40c239f209252359ba7def9decb57b2a406dc91c6e7f8585d9bb773b41edb. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/IL1021810603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5b7367a0e3276c261484412d7ed0ddd2be8c5851653ededb5ad84c92a9c183e. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/IL1021810605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf399ffac2cb8a69946d31ebf0383e209bee7c98373fc9075913d0d0b0fd38a3d. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/IL1021810545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0cd77f376e065f03774aee7259db4fcabffd4352e6713f84cf605dd772f85f7. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/IL1022011727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70f46109f3ec3a7ce60b6dcf4b34cac42844a8f0b7068c2bc2593ae33e426ae8. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/IL1022011944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b45ba7d7782a2dd37f4b88a1b9934f2e8c487fa5a52ce82dfa700ec09d32370. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/IL1022011952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8da68ccb776d0555ca440a3a4f20064500c81041ee1a727611c7e8141b524bd6. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/IL1022011954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc446ef14c990618e0bef142201bcad3c998726edb99d1c520be5a8e9421fca6b. 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/IL7532213075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6aaabf67598b5246d17b05a04f1770f0f7845956482a8f0801a693853f0b8d8. 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/IL7532213076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d409d4c628d2512d9f1cbb7b89d1550d7d368fa992c3adae07e6220787c3636. 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/IL7532213077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12bae607bf8f1673561d2dd7679a2a06f61ce3b7bd884f7fd40e2afde1670a53. 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/IL7532213078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b900afec292e35fddf4d8923f56f1264cdd6c379c3af9cd16628102e71e86ba. 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/IL7532213079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39de0de47340eb510fedca32952e4507f12d57563e4f8424678bb8bad5a54ec8. 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/IL7532213080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f0433290becae426b6c7334166da673e5074582e65b6d7ac52dea4febefeaf2. 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/IL7532213081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x523cfbe89cb8009fde6518065da6ce3dfeb069350c5c65db76274af2ac348d8c. 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/IL7532213082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd02047b6ce129947020075bd80c698ed4a2784aab3c3a6ca05092be5704600dd. 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/IL7532213083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa27d9bf0c02a0e85d75f269b7f9a63a275e1d0fbe458d3c07fc72a5285ff04f. 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/IL7532213084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa157bd5f6c64764fc51f3863b14f2579a249c19dd8cc9f0e1b6a149ddbf829da. 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/IL7532213085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ef3fcb54c3e0c0ccb9d694e816a99618b2baf5647baf64af5fc3cf1f5df1311. 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/IL7532213086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfba54d8e39b78df050db2a9293b627fbb913eb1960001533c5dd570171b7b77d. 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/IL7532213087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x267f0af64f31a1177925ccfddba34bd95438257d128e15c21a90babe59f1301c. 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/IL7532213088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c3dc03ecfd7ed08b6d88981de44f0cc703f09407768c83c1d3add1348f7525b. 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/IL1042004824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5233e46df195d226f5b956a698f1d172dad2c9c3e4a0e15f05e034a6043c031f. 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/IL5842448411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc091c238e319065989c68c79527ab99b4ac0a14eb165b8b31dfbd24b5c9c04. 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/IL5842238064.