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 0x41097affb8b4ddba8458d90221aa3e5efcf9db5092e6015fd25644c22951e6c9. 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/66d913d3-a20a-4308-a9b0-82b89aa69c23.json and https://artists.proofprofile.net/proofs/artist/66d913d3-a20a-4308-a9b0-82b89aa69c23.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 0xa2a5ee2eaad3b9f2d1fec49cd12cdaf1dced50c01015c90e3c46de896cc442ac. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/QZNMV2331673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2a5ee2eaad3b9f2d1fec49cd12cdaf1dced50c01015c90e3c46de896cc442ac. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/QZNMV2331673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb4e8c24f98c906befc0a054de440e20a00bd98db6419e2ed3b5e92cead6f427. 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/QZHN62469023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae714836c4f3779461855102b7fe3f783cefd2dc483678a0e175d9c0e0af0e20. 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/QZHN62469024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade45247f0c2eeb0eaabd156bcb5d1d6cc24f429ef625949ba63546c13e99dd9. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZHN62469025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60e3fab7fbd1dd83b6df495d5db4c84a9544e92196cf69bf7d80987738a70640. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZHN62469026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35e925ca5baa201bca1db5a458abe701d1a9bc3dbf1a1acc6ae8b867df1f1181. 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/QZHN62469027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f4ab1f0642f22a509309232cd61261d145e9b24b947dc6cf5f68db017000fde. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T11:19:23Z), 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/QZHN62469029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcce31ad4bca3c4db09128f8e2be26c52c55ad010a5f511ff8a986477ba7e79d1. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZHN62469032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b8da8a57fd40af50088249034d8b1a67a8c447685076c1384b1fa4c1462d614. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/QZHN62469034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d2a21d8eb7cd1678b3b0e550781cd246c6cb90979a602e860a3d3bcb9310137. 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/QZHN62469038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87b0c33b807b48cf66805634b63e7605515287987dcb3eb34bf3aff03445bddb. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZHN62469039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfca261ea23375409f5b5614bb600674339926e7a7ba99e5f2acc7770040902ae. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/QZHN62469041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb4e8c24f98c906befc0a054de440e20a00bd98db6419e2ed3b5e92cead6f427. 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/QZHN62469023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae714836c4f3779461855102b7fe3f783cefd2dc483678a0e175d9c0e0af0e20. 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/QZHN62469024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60e3fab7fbd1dd83b6df495d5db4c84a9544e92196cf69bf7d80987738a70640. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZHN62469026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc203253615db73f6ca5289cc82e8ee0dbec0911f164a9f0990d582543f82925e. 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/QZHN62469031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d2a21d8eb7cd1678b3b0e550781cd246c6cb90979a602e860a3d3bcb9310137. 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/QZHN62469038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde3d7cb5b28cbe2420eea3a86067318b88f901070abf1b2c58a7316e938024b9. 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/QZZ792435634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde3d7cb5b28cbe2420eea3a86067318b88f901070abf1b2c58a7316e938024b9. 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/QZZ792435634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3ffc44baeb0a4126bd43bf34196a554ec4bc3bd86c6c012f0bfea6aef438697. 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/QZDA52504097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafd9fb5880623d1a7cf1bc3b7ba3bc6365eeb48539e7e891964898268e2c92f4. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/QZDA62561754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e5e5fcaa0a4ce6a14d5c4adfd74454e12eaebe7e57cdd91dcb96b4978170826. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZHN52564078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe761cd4002f47678cf23fb3eb02741c881fabf394a391a3975422694f3b1ee5d. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/QZHNA2559987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8cda99ad47a612773b1013c388203b91c9d0dfc38af28f888e2117ee428146d. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZHNA2559990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca2b7692807f0e97ebf528c0b7f98a168c435603f0edd8f115b394071634ccc6. 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/QZHNA2559993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97eabf150f1c04acfd87f96e5b5907bc42fb1e1acacb7f7c06bd6c94e965c466. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/QZHNA2559995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6477048beca47034d52f35c2302359f87f86518002e5967782c6049d8ff439d9. 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/QZHNA2559997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eef97618342c7f7302ae79f952e395119cdfa68de906ea8ac8e0145a6947033. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/QZHNA2559998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4c08a46ffb75c91bde550a2c0ff27e975933a48108fe6403d8989117a2446dc. 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/QZHNA2559999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88de340de3c46f7ea4933da0b50cf9e5a70e78d13a7a2f69c53c45d512a4471c. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/QZHNA2560000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5439bcc3e8c3c56e5d9f182c346e7f7bb203dfa0e979be29f97e55fd984eef93. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZHNA2559986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4553fed2f249417d4f06a1f83b2242d59114e7561500533e3165ca1b22ff41f4. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/QZHNA2559991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53628281e76196f108bfc091383cbba6f0d540b3bbe9544a7f9a673b053ba2c2. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZHNA2559994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x033759bcc9e83ed88a6c7de26219f216d5e9f3abac4542f87beeeb83f0110740. 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/QZHNA2559996.