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 0x8af810ba8add38003267b90ad72fb88b24671ac83917895ed4be11fe0e36b128. 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/45a5b9b2-469d-4b6f-a7ec-0b1c3a5239fb.json and https://artists.proofprofile.net/proofs/artist/45a5b9b2-469d-4b6f-a7ec-0b1c3a5239fb.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 0x721121268a017d570844a3d3f66d2414519984ae7c82e4f35b5069d779d66f71. 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/TCACW1727124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44d7584f0cbdabb995622a04725a3c6024112618212fc0721968e4c801526eb3. 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/TCACW1727125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd77818f0cfc25643c7c0f41d815d01ea0b1b889b33ad118c4c8c7f3acd9d6e8. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCACW1727130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcab3d6ee0a8079d88785f8eb219e2d311bdcc3741203e8fd6d1636b1e82b5813. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/TCACW1727152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d9334f9f05ec95c6bd0d5232ec31163587e27edce1938ec6bf8ea8c8a6a3967. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/TCADO1865461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1927ac1be7ae79a677c0ed0a10569150663fb0c018fc15c2153dc217caaf4605. 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/TCADO1865462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe213245702ab13662a5855f647155406efc74530a0349e86ceb4a02ba659e4df. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCADO1865466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4182f3a1c0c4b3fe4d3b1e7ea95580287a3a3ccfcc1138ca3fcc89c33662541. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/TCADO1865468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c0f7fb1bb0ae20dfbaedb54316d457f596bd3f70cc26a137e96b063596dc3bf. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/TCADO1865469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b858154f4d0b5b71daf2781402002baf9b992635173da6fc2709992b03cb462. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/TCADO1865470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73e6bf579e73375c8705a9262b37de571185e3095f8a15d611f5c66f47820933. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/TCADO1865474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39252c2c40e8cda993377165b5f3d3a8f218008c679f26a1fd4ba9c75c13b665. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/QZHZ31989784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01421f0eb12e8e9c25a30059bc5489c2369aba690cedfd3b4623db50116989cd. 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/QZHZ31989786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb69567f4da4d382cc3c602cc7da871857d1574e69bf7c295e7aff241310b94b. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZHZ31989787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fead8cc7d1c2774503e39458f7c4975b8f446393cd8cb9ec0cc3ac382ad0007. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZHZ31989789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0670416ba7aba57ca6e30883b77dd43b3a87fed820082cbd4e984804bec952d3. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZHZ31989790.
Слишком длинная ночь (Акустическая версия)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a8156bd0072e15278cdeeae4ee3ee59bfa8259d4f7871e947bc53f44fdb8cd5. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/RUA1D2149746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa99dad8d2343df05a46ca6e0083fd9d4946cc8ee30e755572d7353deaf5f325. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/RUA1D2149748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83b15e9ee00f615e722dc7be91d24ecf0081eff18484b2f93efd0fa5b9e45764. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/RUA1D2149750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95dd5347361d64f4e25492097ef96777dd995df688be5d0531e7476f1f24070b. 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/RUA1D2149756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x190b3a7b2c9bbae271f6f1e85594e83482dbd50fcdac391c1a83e3a16f0fe12f. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T13:10:36Z), 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/RUA1D2149758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb63f9793098c9808ea2a14d3e94e9128c270036c46ed9da9c5244039ed53643. 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/DGA082310081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fe48621cc313f8c2d1b7525afb8a8fd9b5c09b15c0bf06cb6f710126bfe7248. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/DGA092314107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x091953e360aab5284ab5e10e3a8f9f9b24c5f09cff4bfe631a2f1757f240e90e. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/DGA092314108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68d95fa041274c4e2283c1d57be2d0da5f847143d7a0809b2b33bd4609ad2b21. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/DGA092314110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a866e3349e64704cd06ec2f9117d8abc1217f42f4d1af6edd72e82d898ccc4d. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T13:27:11Z), 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/DGA092314112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb63f9793098c9808ea2a14d3e94e9128c270036c46ed9da9c5244039ed53643. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DGA082310081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b263b548bb2c53ff438e62670ea6394007a9ecc5b1ff18863a5d27de68bfe82. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/FR59R2449693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e19ca8e572b2b22e390fc9fcd26ddb611775369f900a1372e15f725ae9ea7cd. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T08:32:30Z), 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/FR59R2449694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe12ad237fd2651204f0470b24b0f2099d0676c727cc12d1c20a4553723d178d2. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/FR59R2449695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ac18acb827b6bc5e7674a69e7fc3db36c4399ecd48eb5751c474d00e30944d0. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/FR59R2449696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e1e463e00dfd014653d6459781e34a9e505c2ae15657930556be02c3d83bdb6. 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/DGA0R2431414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8e2e6adb33b050e07190d7aec2d924f46ecf2fef895064a3f2d1fdac5269c75. 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/DGA0S2451515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f72ef67756d5d3298847bb37b97829c370fa985ce996d15bb06d171f9eff716. 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/RUAH62501840.