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 0x9cbff3ada9a070facbf98de3631ab3c69560ad96fa6b8c467404e10738e589ae. 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/51a38c56-bc91-495a-a30a-7168429f4175.json and https://artists.proofprofile.net/proofs/artist/51a38c56-bc91-495a-a30a-7168429f4175.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 0xfa18bb3d6e1233b9b0835263fc6dad65fa2a63e56d3560f36ece9c7dbe1b4192. 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/HKG732340906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa993e7a55316ba0eeedef7511f534a29899e0ab43cf5fbe448618df381f1c6ed. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/CNZ852307616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47cfbc5dd599fd7c2371478a38cc00910abae65aa7f1cfc206628752d166d134. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CNZ852307610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b417e23bacbc550fa2eb9a396406f2116b0a6f537dc2323faac96208d27515d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CNZ852307596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e100130ca2f440dd16e8fb542869531c4ede5a376f6172980d04e0fc2153a94. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CNZ852307597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x523e6091b3e624f236584b50ffc279de3a175261eb4b3b2c7c2bb7ebe3c69389. 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/CNZ852307617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3730ba7df2a59b0b67537dfefff3a68f48232398701a62849870f64a5082c73. 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/CNZ852307564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d2a1c261268ef1423b254f837721cdbd4f873140bf94bd23a060aa73db48d3f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CNZ852307619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bcb90f4b2c92facb03bdac7beba10fd0403cabe9d730e8c9e1d859367595c7c. 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/CNZ852307620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc8d39a092326ce9a01b87570c7ec4c4b5154e40273970765175090f919ac015. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HKG731741180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0994888c13946f1319d79fb93e5378ba563d2e74a3adbef069e1da72f3d858f. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TWA532075301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18a1fa7a6fa2bf6c99e23814c279f9243ff01e62cf55409e34738a012811b962. 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/TWA532075302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c045e6fcd42285e910d209dffc1ddaef8c43461ebda0e8c5d19dab2b0869979. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TWA532075303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x678becd0e04a8207ce7cfe4a93abeb908faa17d07eb18d2ee0c42df26f4639c0. 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/TWA532075304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda62578ab7c45b5877a3fc4eadecb73e112c96dc7590856fed57e63499a292a1. 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/TWA532075305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98e999f6fe19145752d92bdd87cd796e063aa1f8d77d8d5ddee2b9deb0ecf074. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/TWA532075306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe8008e81b58784108967ed192e5957aa3d2aa9d24ebe014e7d51e4365fefa5c. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/TWA532075307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaf68d3f270db5fc05392d496af58a0c76eb3537b720a3eaab2f4645d5956aed. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/TWA532075308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb30c2981a427fd0d3d91f54d0cf843ec5db896b2c9938badc7fcfc0f4458cc23. 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/TWA532075310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73cc1133bea58e71951adc41947cbd381ca47d3b46fbadbe31eb7ac14855ae7b. 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/TWA531881412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37f68df9636efadc74579cd6989a704a49ecdb0de20cf6b03ed8be55718c8012. 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/TWA531901512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f74212d85d3b1bcbaeed47b23bf9117eb1c65228b707cb0af9520c9700d6067. 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/TWA532075313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f9bf21170a9761f51b06f1e6b185e17d5d9cdf28939bccbe3f13b7ae5ef4cf2. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TWA531881413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37f68df9636efadc74579cd6989a704a49ecdb0de20cf6b03ed8be55718c8012. 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/TWA531901512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0b88312da1205e3f7744815d75ddc8a3a8ffa3c5a65b1b7732e22f63b8accf2. 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/CNC072000289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf77193952941a910ffd359717a7b5b13cc1a796344177d67e7428a4f3cdf8085. 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/CNC072000293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20041dc2d92f03799e40be019fe90ae50db53bb2f0c29b24d8abe640bd92a303. 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/CNC072000303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x159af70f35bf72e6b242913837ccd46f26a17f1fc0cfdee3390af1f45557370f. 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/CNC072000292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c384e9af1b19fc6a117a6c7c8b7a9a379e5183aab05041d3ebcb153dd19526. 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/CNC072000300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1626741e05b0f9530c700d32b13b32303193127417387bb1be4beb1762e4d7f9. 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/CNC072000298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe77183624feff116bf9095a8e566845eff367bf9f8e17354e67aab55d2eb93e. 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/HKG732029058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x678c4914e62b5b3efd10090422b951ba8588f19375b43eb1cefbbbdcdc077352. 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/HKG732029060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a0c15759fdedfa585f5f159dc0c9b399604daad06e627aa0c0fab7bab981b0a. 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/DGA062070376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c23edbe47eb641fde51791ddba214fc20aaf48a101737f69de2225d3661f638. 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/DGA062070386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c1f5ced48a40b6eab3af8ae94fce1a7e975212d0b506edec21a6766ac8876c1. 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/DGA062070387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc832b4e1d65e25baf87a9c6b84187b779911c31d91a5ca75201d57f9355d439. 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/DGA062070389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc50b75355ca39a034480cf9f617843b5330e78c16dd581148bf47b346ee17c1. 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/DGA062070390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4379cae0592bbe2744d29f334e223d95da78aeb1e2611f62022cc9a64d03880d. 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/FR96X2195036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a64d039dfbdd18c76324f204a55e1be43ee15d677836f315114aee2b472a131. 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/FR96X2195041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf544706f03ece895715ee7e5775849b9d9b70970063ae2e058bfbda71f7a2516. 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/ESA012497925.