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 0x6ae918c4a5ebf125764f34cc1011ea2677b6ae24c8e830a7c7c36b7c10385453. 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/a4e7c0fc-ffb3-4935-82fd-111a82035a0b.json and https://artists.proofprofile.net/proofs/artist/a4e7c0fc-ffb3-4935-82fd-111a82035a0b.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 0xa25e5d9eae98f6fe8959afd68cf9970cb43366acc384bd1a09d113a9400ddc75. 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/GBBL72000104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fc4141249617d63f635ecbee9aaf996646d4b8cd142528dcefac72edd483413. 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/GBBL72000105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0197ab98777c92f9ed23e877ea1968250ec3b3bcfb77676ffcdcadb0f6164dfc. 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/GBEH42010141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a2389efad583055ae73571009377d9574943d9a3fc144f5135414176e0d6ae9. 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/GBEH42010142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x305cb063486e5f48b844baa226002d304c24ca64e0058365df5508473719ad03. 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/GBEH42010148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08f65e2771175dc31fadb5cba27e1188f23721e076972a5b9341f29d0fdf7a87. 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/GBEH42010154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x192499b3dd935133ab74b1675e295833a846a4931b42e4a87276a1e8c97064bc. 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/UKR6V2340298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6176037647c479b7216f98d729c7b015595a9a71bc918d2bc774477e28156306. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/UKR6V2443140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cef756cbcd60972e1b36feaaf83549bd039a4179f3b86958abd886bbd8591f7. 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/UKU932258262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2a2ce484235c6af49d73bffe891737a96363f0daf48c53ea48b95f856ed8860. 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/FR96X2291125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d66916ae2461b67264e30c88fd13787a1625c16de20855f0ffe00c7a40c018f. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/US83Z2140315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e59cd0eb61fd68489eb090827d20b864f3998dbeb1dfbd2d1c44ae5a19e81c. 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/US83Z2135829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5ad32fb1f117cc0e1b4ea93a25990aa480d1c64d54f5d49c5e5eb9ecdfac013. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/US83Z2129986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5786630f3978a4beb24ce18aea92cba410fc7f3d23f3d07651bfa15e8689bcc8. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/US83Z2126600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd90b3d1449001e041409bfce928ab68d591e33b9d7b677a26f3d509d8860a08. 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/US83Z2121815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77b8a47848fbaa1757ffebdf1ef5695fec7713211684e6f691e951c931ae5c9b. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/US83Z2120700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f391e396589f8ea67a54d1618e804ec6254e539ea59ddd13dfe9ea236e2fe96. 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/UKU932242786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ff5dafee03aa8fac0f53158b63732fe6abe8eccb90a7caf995405dbd1716918. 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/UKU932242787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x088b25235ce8dec89f7721ad7b0434c886fa423d8456957145201f6d5fa85d32. 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/FRX762265158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88ac5a778713de098a8732bcdf9e299468a8f3d92ac541e6220df19d2379c091. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/UKU932272851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82f2b71345f2b5c6137395cae3f1d17f7da88ebfad63e502b7404d9a9aa8272f. 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/UKU932272852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd110ae0498c3a2e3ec2bd60c9a7d0d3800a6bfbbe06c9394d927cb1856bad41. 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/UKU932272853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cbb7945b90c61b4caf187c70a32ec3ca279cbedc433d091e00ce7843f7d3137. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QZPJ32297119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44d20bab8cb8f9d4c823743dc6a988fd1344923d5ba4e08544af186cd3f0d641. 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/QZPJ32297121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd1499cc56f0c50949c4bf7d880aaac73325221926da13b0c0fc4ca00316ef2. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/UKU932142920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18d428f5cb42b390d3391edeb24fb5ba0bbf749e828eb300d2f65bd5cfe4f1a9. 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/UKU932141503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fcc63066e59d09feed994384a7bdee8fc21207b0526cafd97d9b0ada387cc7d. 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/UKR6V2240209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85abaad57c71994e34f7224b73b57aebf705bb314f8e57e46e1524f2434c0c8a. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/UKR6V2240210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e5a8c335fba6b3712d3e2b8de171ba700aa255cffeb777ca1d3a4cfbf550959. 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/FRX202202101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8416b547fb82998c9a6daa8c50488b985a53f50c11aafe0e186a7e70e3d72f6f. Chain 2 (Bitcoin): anchored in block 960339 (2026-07-31T03:13:37Z), 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/FR10S2256389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50d32730e10b55102aa93d6b0d3357e582392ed0145a5a336953b2ee50d01a52. 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/DEW872006475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fc4141249617d63f635ecbee9aaf996646d4b8cd142528dcefac72edd483413. 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/GBBL72000105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ba8d80e10bbad24989a14f568ed8906123b2d6ef1031ce4ae96707061b5dc8. 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/UKR6V2240029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e70243eb504232f619d8debc8f2df51fed7e11a2f6d4fdcef3bf68c5d5520dc. 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/UKU932142921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x972b2dbd64b4574b90c9c7a1f3adec5bf1d923ab46f0021bddc5a8a61ef4b0e8. 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/UKR6V2240031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x019cd347be46bd7fb769054c173fe8a1d51971f04408b23671c9526f6a48cbf0. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/UKU932273408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1772371cb3b8a474f3f7d8873409c09c87f80e42487d2d91ae5ce9f3e0047480. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/UKU932246185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f5d605013f06a193b4940fb34e80ebfde749752d7478510beef1e8d711d29f0. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/UKU932142916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x789687cd193f42ef3e0d71c545056a36b208c9d5bc0e09a0fcf4381f7a101940. 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/UKU932142917.