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 0x233140ea603d696a5a466c47bd673b1f192caaffe821af6321ad92fb0221e3f9. 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/fc534975-f3a3-4b79-b81c-712ba28d7080.json and https://artists.proofprofile.net/proofs/artist/fc534975-f3a3-4b79-b81c-712ba28d7080.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 0x406c1a64a10099a4f85875a8ad9503e98a05eb887df53ddf7d7371e37c0b9042. 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/PLUM72400127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5fce4c4f2a15e25e68d8ac0ff5c999e6011810655a26c8dbe06d382e8b1f510. 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/PLUM72400128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebb0b4492e7fb13f35807f05170e696fd9ec8fc9a666b8eabd7f719e4b87b94d. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/QZMHM2053698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x149454c71ec4786feb54b46310362eee4329bcce8de9fef292ed2463483cbb23. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZMHM2062782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c0fab46b32bfa82f1617884e0aeb33e9ffe72cf5cbba571dff983cf62076a6a. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/QZMHL2071109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a7edd233af4ba4e84d06481fe12f95444f9765507e1c6b3aa0ca6af5617d3ed. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/QZMHK2042880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d4021fa44c0d9746526b5ec127b621cdaaa49689f85734ad98d8d6dcef7dce6. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZMHN2030646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d34f1606ff4e69ae7bd57421b5c91c31773105ef53bda050444bfd73c9c82f6. 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/QZMHL2008093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48a8cc2b69fc3a322ef4fb6d0a2cd057477d19da1b247d6645be91ffda65a4cd. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/QZMHN2039511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2ccfadcd611e7735f12dca0af8e9aa71d4c5c50a2cb454bf79e70a0b80f0f0a. 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/QZMHL2084690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b6c0cc6b0aa2c408b357b005092032fde576a17530bd036550bcee7ed1f9932. 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/QZMHK2065676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x801ed731b7af6116a6fcba313344d57a29695f9f549fbe1ecf9b144936faa91e. 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/QZMHM2081101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cb16030b19ed984ad8ab4d82a4d927c6166359cf3cc2531f24d85659894a57b. 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/QZMHP2055449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f2dae1e9aac36678fcca01d6d1675e120b14df9e3a2db5cf6344c0f67767eed. 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/QZMHN2042376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16c5f18ba57149e517bca680813dff9043d0b47c2157c41a6533cf2d48abf5b4. 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/QZMHP2065347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7addd87201d095cab885681907a4e8f5623f0d40231f50e4b49905caa83cd9aa. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZMHN2059183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c449d85ad75d13c918f2c3a01ff390741cce3f62705c384f74a48aaf381a37e. 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/QZMHP2078169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62a1068db82ff5f6bfcc862ce12fc40469bb1a6547b92fa48d0c1101bf622912. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZMHL2021609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x990e4c52410eb79c282ec942b42a51de43622029321ca897b5148498d8b2e90f. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/QZMHP2017024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc5f0a36d487c2ab5ec21df4a06dc4f7db6f928cecf6ad6169c79c49b91beb77. 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/PLI292100248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe02ff039ceb4fc2551dd5866e68824035707e755a87a543890e1ecc75df88195. 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/PLI362333119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc5f0a36d487c2ab5ec21df4a06dc4f7db6f928cecf6ad6169c79c49b91beb77. 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/PLI292100248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbf22fc1cf2e814756c5d08383ded20015e40457945094a3d5594e2d48087280. 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/PL86E2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89cc08443ddde22196ed864b98123fd27ed6e0dee3322082b7134100b1536a55. 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/PL86E2400001.