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 0x97338ff8b8d2453343cd02987cc7d90db1f5589097c2dd58a97c70f28aa01f67. 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/74ffdb04-08e6-4cb8-a542-a047fddff354.json and https://artists.proofprofile.net/proofs/artist/74ffdb04-08e6-4cb8-a542-a047fddff354.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 0x835d848459c91d2ea19ac3dd2191f45dc11860caf2d05e8beb1b2e30f1a9ce98. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/USUYG1256169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbec5e51d48265ee51510edd3d672f7ce8141a3a62040601ff7b55b0eacdc03f2. 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/USUYG1258159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc5090a0de20cb8e23ba531cd123b1b64c1c669ce3a76bbc0aa7ad75c97bbbb1. 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/USUYG1261443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb54f82c733bec6e92bb70464ec253f2814b6fd38d680220d57bccc9476d65624. 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/USUYG1262373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7377e98774acf23429aa02b23c7fd6c496a3d989795c16bd3ad848700c6b0253. 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/USUYG1277511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf46c52ca108941eeff86a746b7226d37048bd2e474b6de4849fc6ae558248fe3. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/USUYG1286426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ab3f3c90a468d7f29e81e78cc8c95a9506fa3f2c2f0849d30a027920c9815cd. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/USUYG1302565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x776f5eb3c0cce946ba894c11879733a13da3c816e2f13eeca30372896af7559e. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/USUYG1320597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63b57759133de9654c9f7b3876f0a9261249c71bf5e23bdea6813970bdc0fccf. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/USUYG1322220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd88da4a787f0068ac1838e9eebfaa8748673d03f112411ea2bb4b18fa8bf4a3. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/USUYG1328890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ca79db3efce944b6b2db54e02dad94594cc1b2e91eb7e61f503b5c54606d98b. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/USUYG1337780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd694fb8cc4a073c64bf75b7e24334ca41d0b1002d7da2da1265fa2e6ed045e. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/USUYG1351967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe94248a98c38c47626948e504527723e2cdd64f4223648b4d39d5f68010c27e3. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/USUYG1354681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90c17e1a3eb714267ca7f84db490da61bfb573bc09cc53a1c1d37e2559c8386a. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/USUYG1377347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf980052cec7c55c25f8318f5cdd2c8cff1706ac0042703d297e54e8119244bf1. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T13:52:01Z), 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/USUYG1390759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9899bf2b37260ef3f233bdefdeecff67b575558cab61e96bd82fe7b0afb5aee1. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USUYG1391013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x802872c6c9937ffda5f7e8ef483dcf2dc64562633415f3ab101dc3e573463fbe. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/USUYG1391257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x060092f2eb63a422269b2d9ac04b8c285bf059afd7b038310bb9ab597289026d. 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/USUYG1396414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa798252cbcbbda58435b43cf7056e22fbf8837e044d0d096a68dbc15e11c1549. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/USUYG1407935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca681206722174d34a808eb6ebbedd4dcf9d1513b45fd63f31cb69adcf2d9fca. 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/USUYG1431719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5adda38c37935ee509dcd282b92a7e31f145de7c37fb0537164f85ff9231cd5. 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/USUYG1440861.