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 0xd1d1525664d529e597ea316d3367a857462108b364853ffa98926e5370b6295e. 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/f2a65241-6c67-4faa-9b04-c60c699dc6b5.json and https://artists.proofprofile.net/proofs/artist/f2a65241-6c67-4faa-9b04-c60c699dc6b5.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0022b8ec5734ed81dc12ccde1f12659f3e449702f9b1fa9ff969156a97beb78c. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:43:41Z), 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/GBLV61810355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ef3be85f0c03d967863082f7f9e20e86919a5965e2660dc257f6230305f3a77. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:42:03Z), 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/QZFZ32010865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18bff9fcd83fbf1039744d19f90167580e5e4b8701b029784216d4f0fe46f98b. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/DEH742034916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7fafb2e0450b156cdedcd6caa6a67f63dc00defebfbd6ea0c94cb47e8391365. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DEH742324984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f7e0cd857f39129903e59e0bf2e4f3204d6c8ccb842f81c1e04a5b98d941198. 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/DEH742324985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05d88cfd6d9259cb009334dbcfc9c4c887e49b89947a4c1a128c637a38b0a656. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEH742324986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2767ce6318469f1b59f15502ad2d66805d7ea53fd1f51e229a7696112c4d49eb. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/DEH742324983.
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 0x1c51f017f2b0a8d67f11101b4e84832b8870e65f55f1db07dbe6e6e203400fdc. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/DEH742324987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x638ae900a4bec10828c59ed17d2ac99b3305b6b51f1e6bbeef831b20bc8c6145. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEH742324988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9428989ddeff377e9a425e44722839ce1f8318bad6ae2fb99df87c08d8b274e0. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/DEH742324989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bbe28844140eae0cf042c30d2bb7c51c2ce8a530fefdf85fbc0d4537881a43c. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DEH742324990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1226042d0c864a0607beb6394345d56cf8c723229ce6fcb514bf1cefa1379727. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/DEH742324991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97718d5d8f2c2e5a99f615f08a765d819ed38535efae094b66259cd6d552f7ae. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/DEH742420371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab13cb7b471142a4f777224d5df05aec26e64707b7a267ca0f1d81928c4c024d. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/DEH742420373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0772361a2e8968db5e5b0bb66cb05d56a74f57b48b9112064ec620e7cbc01d0f. 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/DEH742420376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4146c0ca0586f9627a4560e08e4ec625550bc218856176c31492fd89c18d0113. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DEH742420377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0f006842feb8f582e11e96a8453712f3ec0dafedaac05946165966d5c7a4dfb. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/DEH742420378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13565076d5c5eac4fce8ee52736d8a4a2907c8f5389782404b82ed7bae4ab7ac. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/DEH742420379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e5c11e0ef1341fb44fa9b917f9ed2b35f5a38df92133a871b22ce2b0f402ea8. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/DEH742438800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4497abb66a35aa1f92743b687fb5af5df2137efba3a0203fc75b8ad96db3a833. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/DEH742438801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x383c73e58c255b39bb5827eccf2bb8d7cf780bc4d42fcac3312c685cae41ba3d. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:35:12Z), 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/DEH742438803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8f5e17f8a5c39e7278b8fa1727233cc580cc4554603a8e857433184ec981f0a. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/DEH742438804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21ccdcb5fb0753f0f6e3ab0631f99678fefccc60c5d044ae6612945b683f2e1a. 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/DEH742438806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e5edd2db5e40ba6787252526e7db6712229a75fd740165ca7ce2a5722aafd24. 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/DEH742438807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaed3be33873b6fb0026b24d8c4dba22d73d0c4f2ed3710a38d40647d1f2268f4. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T23:02:38Z), 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/QMFME2520636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5b285035bd3abba53d186cddb004bbb3dbdb08a4ed073f75fa50ebeb2a0b09b. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZZ8A2526497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80b454c462fce4aa4979b6e1669de6f9db0332f992a3b5c8eb64d8db6011d401. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/QM6MZ1973607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d91d5d1150036952c16126110eb08791aac1922b10a20d3413f2e4fd64b9d98. 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/ES71G2215518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e49ffe76165ca4a8a5efbf95471e01b2eb11abd90efeb99693a8da269afab1d. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T09:10:15Z), 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/USA2B1602046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcc4c3d3f284570104a49f5915d6255ef36869273f8c13fc7eb9908ab0a9e8bf. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USYBL1301351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa518e58af11a97eb46643d6f32d5d972217a49a82b4766652a7b891175528b3d. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/GBKQU2291201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41a2f54e5c11a0233e767902eeee9a37d5a1b1fe6435efb03e13863c699b55ae. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DEX262000800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeafd2657fea87b7a02d97a92f186085669d6795df4840271fc2d194ad190dc3. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QMBZ91957038.