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 0xc44903e6c0f1b9b0f1260161e37cae30c800ffd67b9aadb80255efa832c0e275. 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/f5faeb5f-c3d3-4887-b3c5-613f3f4715a9.json and https://artists.proofprofile.net/proofs/artist/f5faeb5f-c3d3-4887-b3c5-613f3f4715a9.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 0xa4197d66eccc6c32b0856b83c753fe50b604164eec1cbc9a6a7f9fe0101efcde. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/UKR6V2358533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dd958b2829db4f89a18007b724ca29fd3f883e4fcacbf644ab3d2e444c14724. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/UKR6V2358011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdfd235ecfff01f2801b613cfdb22d677f60fa6cbca7c8a42016a96ade6a2bb6. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/UKR6V2358473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x859556be4bf26ce4d4315e63d1a865b440bc0cdcc118a7a0a3ad42d9d7a93270. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/UKR6V2358247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bd9cb6d7d10405e32665960e347aca3f413c042c0cd967141d5a5962a9ae7ef. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/UKR6V2358050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7481d4a7f0bc269a6ac422d6d27957a2e87a205ad0a8c8873729dc58aeebcfc5. 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/UKR6V2358044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa558f7f7d249ee3ab873436132fe5e4b5aab148439c0b158c73e95483845ee15. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/UKR6V2358066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x376cd3f382565aee911c392f21deff576a899ee83d4a7ec6eb4341cf4b9bbe90. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/UKR6V2358047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59eee3ae4adcb2d20409f116d6c1293be507019c5ec20eb6567dc3608503de58. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/UKR6V2358793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e6a23830a6a0212381b2d574694ae0ac456509512afa51c68acfcaadc327333. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/UKR6V2358350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a975e10c6eafc1ada7fab9e1ae7e76d2282f87e1afebec365353b0f8b704fe3. 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/UKR6V2358347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e0c247964f8ed6c63dded519873846121a83b6ee21da9622f85677d766f5ef0. 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/UKR6V2358237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2471eb40330b98d6b5e822b413419b2a3c0a4e8f2e9632e49e9a824a3307412a. 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/UKR6V2358087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82c1039884997126aa9b681f38d1ce7201b575d3b10639d571de24e50068c172. 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/UKR6V2358067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80d6cb430341f834c698e29f33e8f229249153b8ba3e0b039d4f1a08b03b1fe6. 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/UKR6V2358070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb893e1755b54ee340ec5dbe413aa6c9f120b5331b4309c4b809915219196a7cd. Chain 2 (Bitcoin): anchored in block 957249 (2026-07-09T02:31:37Z), 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/UKR6V2358082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46d2fe1da0e065b5ac8f272c1691f6dc8ecaa1c5def198f78b193029868b45c7. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/UKR6V2358989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdfd235ecfff01f2801b613cfdb22d677f60fa6cbca7c8a42016a96ade6a2bb6. 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/UKR6V2358473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaaa258ed24d1a69ca02fd9b69ad8d3640d517f7798955bf21bdad4b72d29101. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/UKR6V2358329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x914717a816f60fb743e8786b49b522cbb6bed1638c703ed8326d9e96a6ae7a5b. 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/UKR6V2358259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13299251c2ef597f34fcbadc6c00624b7e1a8b9f1de59683eeb50bcc2e634f05. 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/UKR6V2358041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23044d6501a4c5b02d67ba19f3b31ceb6a04f5383ff55d32bd2c73c86f83a27c. 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/UKR6V2358483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2471eb40330b98d6b5e822b413419b2a3c0a4e8f2e9632e49e9a824a3307412a. 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/UKR6V2358087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05f7684f206946987ae1c0203b30b141e9701f07c0ef466c41ecdd920a72b7aa. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/UKR6V2358012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb40dfb7bb01aca7043561470fc7a1df4569d8def8ebf1013827791d8d605907. 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/UKR6V2358018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x934aa173a0b7512fd3ab27bc2025a3896c23a0e67d5b6b384521f59e9154cfa7. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/UKR6V2358014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27d771b5d256590dc773b7c72ffd515defb75924ff6f07821cf342a1cdba800a. 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/UKR6V2358922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2abfdd4016c66d553706170a7c7204054c4d1850d41056c13274d8798770a497. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/GXBNP2456663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc429e856e655d61353a806484582c1f2784d6be1a41f0ad346742219d484ee55. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/UKR6V2359223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16ba711cd734c93c3cf3b4fcb60ac39b686bd1689b8efd501db7bddbdd8118a5. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/GXBNP2468983.