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 0xdc8c63a33a59b34f2ba8190cfbb5a5cc003c867ab1b117d1b13afdf0ce9155d4. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/89974586-b129-48b6-8ae0-dbf36c8712db.json and https://artists.proofprofile.net/proofs/artist/89974586-b129-48b6-8ae0-dbf36c8712db.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Klezmer Village (feat. Christian Dawid)
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 0x2961bae63813071b4a9de44cb6389d31c983d5ab00341dd2069acdea5737873e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USCGH1165949.
Leibowitz's Khosidl / Hungarian Dance / Bukoviner Freylekhs
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe99ad35a550beff231ef28ec5c99ba5eb63777dd405a0d8f0c0cb95c3832b124. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USCGH1165951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bc2207a9318f956da4b2c00f29f9ba9100a51824090d171ab6215ce1871bac0. 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/USCGH1165954.
November Suite: Sam's Forshpil / November Nign / Sirba Garofitsa
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb68bffe148daf6c1c699f6c1869e3b59e77001c9b76c8556fecb803a908606d2. 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/USCGH1165955.
Viola Suite: S'iz a Ziser / Mindlins Redele / Voliner Wedding March
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91b5d7f42f8fc3b82b9a49b8e839f5536e2359849f48fdff07b25b04fc4f922e. 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/USCGH1165956.
Ukrainian Dances: Newelrik / Zalaniwska Hreczka / Chvèts / Hutsulka
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa04f7969344cb57107851a9c28350e49f70ff392e4410f605e0483bbef73e9c6. 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/USCGH1165959.
Yankl’s Forshpil / Nokh Havdole / Freylekher Yontov
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf338460eb76cdd7849080a602fab9d29b79b02fddb860718ac4d073541b58716. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/USCGH1165948.
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 0xfdba462bcce1676e0b00788424720744048f7aab0948207a4f28e134a41c42ef. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/USCGH1165953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5385b89286add59bf0399e4bc227ba1f0dfa981718e2063b0c8ef3786077f17. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/USCGH1165958.
The Bride's Waltz - New & Old Music For The Klezmer Violin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x323312cdcf57c32d9ae44ecfac63f88ded5a552d76f2683ad2a598772c12e332. 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/USHM90824433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14c5d1ec4800127d79908e37cac963bdb07951233f5a4503f1a013a5275b0e91. 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/USHM90824439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35a73f5fe24adfb075017f398339cfd97eddbefbdcd49d2b76cee277b4ba7d5c. 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/USHM90824441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x034009015976c80048bf0dd1dbcd238e1292e3284460b82e295a044a08e700bb. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USHM90824445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a816bc3eeda3c75a152c96e6c41cf4cb96c2e038bbba72115790ff4125fb135. 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/USHM90824446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x658a1c654e1abecbaa7c71112f96c0d8d5e5ddcaa583866f5506b957cdfaf66b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USHM90824447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad01be1e41206f3f6a5e603d76291897bd265d0f099ceae11b80ae91885ffabc. 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/USHM90824449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4e12a398ab7a4077e0b4c8ed4fd10ffb62c2b9065de9c50c97b080c4d08dfa4. 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/USHM90824450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x613f57fa739991d69d4207b01be5ae71dcd415f3c5c4f720829d96737e284b8d. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/USHM90824431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68cf86667f772fe539b6e6a01ce30405d7afe9f9853ec852bf2d8230d9d80c3e. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/USHM90824434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2a82640ab3c62908f23124ac68641b0a52146d1c7a5e8bb2c5c38c0b2f3bbb3. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/USHM90824435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea1b7651884c3aac99929b11cdd2f99c4381d571632d2093a7f1379a08a1c011. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/USHM90824436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bff0143ff1933c4f11d25025bd26552f1466fa05ff9f18acca82341c12f3f92. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/USHM90824437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc61440c264955b92504c92e794ef22228cde4689da98c49bda0dfb7d7d216c28. 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/USHM90824440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f1fdfe713715b39b4c8b34d9a69bd8c3d329a080fff6ce0b78fc827fb53b109. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USHM90824451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0fa015f0a37a6d88d2d514a1c0a6ae50100ed8c3bc8c6f63a23c0195d8ce394. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/USHM90824452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe09467e5e3f68d9a793002e68855ddca4fbbe6b51b684b6a9358c6a263d723dd. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/USHM90824453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31e52e2596487998585bf3d91d9526ae546742ef40543dd167c891e8efac9a66. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/USHM90824454.