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 0x27fdaf2bff901c926a6e960eb25ce5e2cef9ed3a7b1048b5a3bb012a28aff2fa. 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/66c64b59-8df3-4d0f-9b69-f0182624ea1e.json and https://artists.proofprofile.net/proofs/artist/66c64b59-8df3-4d0f-9b69-f0182624ea1e.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 0x6863153ddd6c2998ed5e90a6d3af214ac15ef2d87df206e1304b5f2e6abea777. 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/MXF061100575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34909d3d9217b36e5e33d01186667ca24e5fffc95324051368da3db142e5f784. 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/MXUM71803097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd8c659030316bf431e578363f3b0dbc5317fd23527cf03a840431e96e834e5a. 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/MXUM71803099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5da64426a0ec237f32d1239806af7f2d861a467c21a5e06901f02ce9288ea125. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/MXUM71803080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ad57588fcfdaf37e5c1cf8167243ab8e9d4c91281df52004af4e950f885eeab. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/MXUM71803081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x941c294337d88beefbd93e41782b522fb44767e5a4196f055c0afde3c4f3ccca. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/MXD781805471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff263f1def2544c6fb0d4e31d42138055d44527823a815283ea7f10f1ef8465. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/USPWN1200304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ad982b6fbb05342464f92627a031cf1273c9c0d86b1ffa13ddc8a384f8e7c60. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USPWN1200305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab526dc5ff38aa905ad18e49810d25c4740102996fd2c548bdf9b82f090ffd9a. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/USPWN1200308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a0282e9371752a19b55e80699e311d7776c217dec6261b97728c9e46ee32879. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/USPWN1200309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22ee0c17a53d4bc37830b920eef44289bf3dd7defd667c506deadee642b9db51. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/USPWN1200310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3224d21c2521336079b8031bb70fa322e9925d87bd58b815656c5e68ef48192. 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/USPWN1200311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc8577ce834d8c5a58605ca6cabc03d7189483e2abc4e9cf4f18c74c49c8a61d. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/USPWN1200314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd504267f891ef0a24d80838da16209c8c6fd8490450b6c701ddf5aff3ae0561b. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/USPWN1200317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd09c23f4df857409d7544ba0511813a15aad37f5cab3841b42187e8a804bdfb. 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/USPWN1200320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f2284c156954cea809243f4b709e959a980568b81b85bc6232c12b0967a9eec. 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/USPWN1200361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fbe9ab356299cd7651043201463e4ea0338dc2c15797d5a78033325b020cd0d. 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/USPWN1200362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8ae07fbc05501e5857e43272ae77b3b1a10ee6ce90535db37e1ea3c2d1bc9b1. 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/USPWN1200364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c917780d9d32b6ae5a8588c4bddf485e18a5c9ddf532e514867f5a5209f5800. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USPWN1200365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x335f5a200963639e9cb0de0deaa0f2076152d2b638fdd952301cf3a5bb626de7. Chain 2 (Bitcoin): anchored in block 957728 (2026-07-12T16:20:40Z), 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/USPWN1200367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69f65e753d13464d059eddfd708091acfc5d5478f46e6fb9c0fd1688a682a2cd. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/USPWN1200371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x908eeb4b49f1a16b90ba541177e741401471fdcd16d0ff0fbe74905f50f4bdd7. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/USPWN1200302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe54e8a5fd736c72e14a18ee8779aaecdb958dc961b0c74358ca720b15a303333. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/USPWN1200303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33fee03410b56654e549cb351b4564f2be7f91cbe8fb739b326aa3c8c71c65ee. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/USPWN1200306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a61119e517172764c01310cfdad6abdefeaa917603bd18bf3d7d02a2bddc52b. 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/USPWN1200307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f55e2676e3cfd28f40e8e7e32210cee99078388a496b94194c2e8a5aafe197c. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/USPWN1200312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f9986152df2baea4e7ba9c51587773a8ceb85df69db26bd9f382c7a4eb4b92a. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/USPWN1200318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb9c93b0d5e954a69b3dfde3fc36434bdd38cbfe7a12e9c4af755bc8bd9a2a4f. 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/USPWN1200321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c2f09d23e5f87149c30a292a45e91372ed5c35b69293fcb46e68900be95455c. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/USJ3V1323555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x767f0bbaa7b4db3a47356f55cfb196df005aa4692727292b20d01bd523113114. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/MXUM71803077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7259440bce824583321ef0cc65e331b96165ead14a92a9827b2d3295f6a7b285. 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/MXUM71401494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ad57588fcfdaf37e5c1cf8167243ab8e9d4c91281df52004af4e950f885eeab. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/MXUM71803081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf362e0b2c8494e16ce1577bdd719f23d538bc6dd6b88d9f67b25ee9c62539978. 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/MX2972320417.