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 0x32283a6bb399cdcd67a3c825a600e367cc82cfe3c6d38ec37721b1bfbdd29857. 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/1ae5c985-072e-419c-a509-dc1fcfa44b45.json and https://artists.proofprofile.net/proofs/artist/1ae5c985-072e-419c-a509-dc1fcfa44b45.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 0x85b2cec716b7412ab7cb6be6cb71f4d8eb5b109d59025e74e50472737fd41399. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QZHNB2149539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x345f870cbc79066d6ab478f19a6aa16378e9661cf27037118936f84fd6bd743e. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/QZHNB2149540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf6f723c87db72c1785f3bb6db2d7ee713e61d0e4b86193018ecb9cd5811caf2. 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/QZNWR2113135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0be58ede0ecd7fff2288e4aa61828799657348b53a9ff1f77ff0372238d2570a. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T02:33:54Z), 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/QZNWR2113136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe67d7646607d3747969879d90d561e8cf5926cac2df2f5cef4e803a7bf24d253. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZNWR2113137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdffe4b11c1181df51528741c56abb73210f555c9b4b44f516bcaf9ba45ae3200. 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/QZNWR2113138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x774a3d4e1448fec10715d590f55844a2331cc4750ca7945d0d77b690d7da5c0c. 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/QZDA82255794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2797e77a64e4b72c4037047d67497dea2ac4086300c5dec2ab6e0afff70e4052. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZN882224614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x968d602535ec5b57c5fdad7e29693b16f8bef0717f5fe14e12cb53e0df2755d9. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/UKZGC2204115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9752c74f240f4886eac4e15301c78d28656fbcd32353a1968543f3d8b258cfe5. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/UKZGC2204116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ed88cf972d332dfc6d6b55ab3ccaf40120acc7419737f575419813ea4e3d00. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/UKZGC2204117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c2ae46299b9b05378a8e7f561e6a48309b42ef5e97a5a0e61cc5da3edddf6a0. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/UKZGC2300749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a165ae8fcf5fdbc3d87bd4a94bcc08876b95908c581300e3753e75f1aa3189b. 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/PL0B62316517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e7260359be311ac1551b73852bc6b889d7d28032f063e1c43acdd8c3024ca16. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/PLH492401827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3f3ea7f075fd0d19947737ccc0e8adb0c93138a7f0cb113d1945356320bbcf6. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/PLH492401828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x389e84b530f9768d44015b6d5f2518768efcd5152443d502c5210546557d6f12. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/PLH492401829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5de4f58154501936358afb386086f7590f3dda22074e3c61eff25fcca4cf7d5. 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/PLH492401830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bd05f6ab9cccd805d654c72fddaad5b0fe177fac693a55f49df10f9c94219a6. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/PLH492401832.