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 0x2ee4f3e7486d1e6e441487657751f7075619ebca1f0a93cef6ae5bf45ade7845. 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/f1d07ad6-bc58-447a-b365-e34f4ab88b75.json and https://artists.proofprofile.net/proofs/artist/f1d07ad6-bc58-447a-b365-e34f4ab88b75.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Coffee the Favorite Drink of the Civilized World
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 0xc952465bab23c3e78cf7406b4c8712e713ad28f9f4a13ed62a5d9e2683c04b61. 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/TCADL1861002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21bbe94093c283206b4f2c4a467cae24a28fb4531020395aba63716aec88efcd. 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/TCADL1861005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c0d4d2c681cab99fb11343f560b7dea47a07b8a644aa25fb01dfdf69b3b2eb7. 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/TCADL1861010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fcd12603878d5500dd9da963d4aa0d6a865308e83f1a4acf6e8903c0da6e6ce. 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/FR9Z61800229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x186a7068c4f24e64c3eabf72179ba2f50ccc05ddab2d1e5d226afcc2be19444b. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T16:12:29Z), 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/FR9Z61800231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe48197412fa94a878c0dfabd0b027c6c689b6894657480f312999c2052f78a1e. 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/FR9Z61800234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fc981a1a294ca6484882d98d753509158f8296b564694120783c9f80743ff1f. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/FR9Z61800235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8da473c6bef5b6327212875b5304792cfc712b3ddd16236dbd54c715f9339d3d. 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/QZDA61980316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6b5b35e9972e444e27391face2f7eb1c6e9a064b76c35292e81d77cfae78607. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZES81923708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8f5f8e09d9e0d2d1ffede50a794ff72f177ac99b85accddd11113c05413e47d. 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/QZES81923709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x650e8e5b33c3d29d2efad81bfeed4fe1c6e4388a5888850b684c6d95ca6a006d. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/QZES81923711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80a426e29858381bb65035dc3c2400d6aa3878e9d8280c610dbf3f749cfec0a2. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T10:12:17Z), 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/USANG1917732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dbb68ad322c2ef3427d896ee1801510a005f0b88566261a90848f5f2f029b9a. 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/USANG2008479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa821e4348ed3b9c8053f785ef3f89ad5cbca01085aa39d0c31de3ebd7b91a3fe. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/QM3DF2172674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd58bca988de8bf5348b165f2137ec7f332b19e02be05641d371c954449fe4a04. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T14:12:28Z), 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/US3DF2221420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23673eb298391f85ad701843b91d858a0bb19edfebb21f12ead4b756fd48b268. 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/US3DF2448569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe847ccfbe9dc4aafe7d13da5da3d53c46d7af52389de69a22edfb01920a83ac8. Chain 2 (Bitcoin): anchored in block 958535 (2026-07-18T09:42:49Z), 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/US3DF2448575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a40f481844efd0335c331a16eeabbece20b9b8f9b4f8dce0558daf41d955d89. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/US3DF2448598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc301f738800cea469fe8f00d76e4c8bbd8d75a41550725f74abdc47d405c4cab. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/US3DF2448605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5db009294704cb92e84c5295919bb037b7b6bb04105e779f4d841622775ed3a. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/US3DF2448607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f85b5e4e39fe17f9894cf67cbbd11e17955dfd107c2db02ff38b6fc1d426a55. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/US3DF2469189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc91143771b35bcc8ffedad61bfd89edbbc60332721efeda5313271e8be30fcd1. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/QM3DF2419339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe07664da89263f225ff40d24796ba7f1bb996b4d29ec11dc3e9b6b6b117c0b. 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/US3DF2512856.