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 0x7de340a6bfa0a9337d9b43fb72de9a679e4f24a001a4b02c896b1f96fcc4d2ae. 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/4fe80621-8dd3-4c53-b680-985c2d381811.json and https://artists.proofprofile.net/proofs/artist/4fe80621-8dd3-4c53-b680-985c2d381811.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 0x783c596c39b1761d2f6232fddbc6c46b3e4723ca6b171606229c2c178e22f5ff. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/FIUM71500389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96d72a9578042ba35134fbc2932b4fb9ece70e27e329a430f986f7d887f05293. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FIUM71500132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15a1c535b3c5a1d2133ba4a1957bdac08214029c29eb63a5cdfdf1e4cb6ee53d. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/FIUM71600028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77c9c8b09abd1ef53677a46f59c1ee8999df3dbc1288f0adbb4420f2e9aaf637. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FIUM71400820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d45f731e2acc344b7a38dcdfe28851d1cfabda4f163a9844095d17f4a2a5215. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/FIUM71601031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x516a5ec758ad086bac330d7c6dacd8b961dba127a6f1ecc0a00014db7fd6e69e. 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/FIUM71700559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fb6b861a68babed12984af8948457f787509790749fb33ad83989557dce5e83. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:44:41Z), 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/FIUM71800014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74e8f51e747b628991bccec76ad681897de9376adb1a8f5d67d853665788d727. 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/FIUM71800227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x242dc3c0d89a9c8e6bbc12eb470332c4354902b6fda6cea160cf0df3aa522313. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/FIUM71900082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d5876ef24654cffd5aef2536a44be71e7f77409e4f44b7fcb88422923816f81. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/FIUM72000350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20b2ff8416ceeac5f331db3b1649d45ae11d3ba06c3088dec66f8cbc8cdc7421. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FIUM72000495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbdfa0396af0476b9c5b366a12e29cead734216b0ffdd3e801536b0a92f5e36e. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/FIUM72100093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bea89858b38b38bde0965912eec2a9bc1a04ab4c27674f6c84566d407aa23a7. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/FIUM72100209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d5876ef24654cffd5aef2536a44be71e7f77409e4f44b7fcb88422923816f81. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/FIUM72000350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06ae05b40d8a5f7e6c80e2ed3218f18772cf5e971b3d980e4846a99ee73c77d9. 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/FIUM72100212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb5cbb8e62f597f18e780b04245025c479de4a3d7769c61450f7d31f6f08eb90. 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/FIUM72100215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ec8f9d745c75d3f7a6c017e48eb1ebc7737fc56750b12e47893db138d9e3cb5. 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/FIUM72100315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeca67f193498fa4973ccdc6df6d13bf6ac02dc6818b1a88b1b47e1ef4ac5598f. 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/FIUM72300292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8fe294a83af40a7c7e132d8fca203ae45c68c8f54c250120c1e6acb9215f463. 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/FIUM72400054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfab014adf9dd2ee4d3f74a69731d54948298d2c14c7c6403178e03e8a38a4cf8. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/FIUM72400056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20ca786446fc7b43da41ce18815b16344d0a566341d2d23fa76fab55e18d60fa. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:44:54Z), 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/FIUM72400058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f38d1f394273b45d9aecfc910bff87a40f4c10c61fb6e2577c84262dd982769. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/FIUM72400059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeca67f193498fa4973ccdc6df6d13bf6ac02dc6818b1a88b1b47e1ef4ac5598f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FIUM72300292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0605ddcf4115c874da038112e84078f80f9ae11b915291206586a30c6683ffb. 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/FIBAR2000038.