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 0x27884f35b78dd48620f456efc8ad6222a1bfd76af868fe37a3354a9c33595e45. 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/abe1489e-0646-4521-9146-5de63cc2bdaa.json and https://artists.proofprofile.net/proofs/artist/abe1489e-0646-4521-9146-5de63cc2bdaa.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 0x9b8c574116054e162bf400eb58b4f77bb2d8c9f423ac83673bde822b6a6ee656. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GX53U2370079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bcee2fca6eb6c7b770da23d6e9f61e252d3aa63aa7e07d642dadfb06ebe8a62. 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/GX53U2439837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1bd3bb508e677c8bf5390481a409f7aa5d2c45f53de57fc29f8e46cdf78832e. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/TCAJJ2574024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x966ff74ea77e2d01c079eea013eba6c76fe93aa1b6c9f46994639aa45adb1594. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/QZNWV2555150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00dfbf00e905d15f04275d898bfca1005e60da96e66d8055f1481b47b1b42cdd. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZPLS2586522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x635de783456f7e540bd26567dd1430e495e43d039aa0738e101ff9cbfd137f24. 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/TCAJT2599452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ed9463ea1f154f9422e4fc53c7f319a3217d046135bb1cbca4b3a66fe04c668. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T08:17:14Z), 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/TCAJT2599551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d9a01f7a004298f37c8f0484558ede1cde2c8bbaaaa623a182158188a5ad07a. 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/TCAJW2504129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95fffea7b5187193b120a018748971419dfffa9a57c73c65d0ea51ac54d3c0f7. 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/QZWFR2570924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cc9b181a19342c8c82762fc29c95cede17f0748289edb8b2ecc181ccb6858cb. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZWFS2516480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdf33491a7d56698e179cad422b2a94bcbf49b69887e5031fa76f30f23dcd71b. 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/QZWFX2545262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96380845baa3c7aecfb7261b108c54dd3540adc8c9b94878ecac43566226d02d. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QT65Y2524711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f7f122bab537a1744c579b59f58963a6f6cf35d4e8045c6bf818b58be1369e8. 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/QT65Y2524428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22f62273cd9d1aa02be6f79270f5797d42c912990154825895ddaf8e47338c6b. 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/QT65Y2558167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb679a5d716c79d10c8f02d259f2b068209009cfe5f05abac87a76aa96edcd1f. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QT65Y2579273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37d96f3bc7b2896ee85f554049e99f78506980de3cf3f1d0eaf12ddf864220c1. 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/QT65Y2579312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeafca4235db5c4007b9f4743012582ce901b325af1811df3eb3b695ae3a19316. 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/QT65Y2579209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffd028fc2a247979de8582f4e443f40d1c3c6ab91b178fb57ed8dabb109b1690. 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/QT3FD2534093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0999066bb20fc64037d0f7ca1cd385a71fecafc3659e4c845ff779f15a95347. 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/QT3FF2513638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49781b8dcbe7ae2463f38fd1d9122c72d2dc10cc606298a2a6dbedac874a1f3e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QT3FD2597967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16e162732b929230c010533e9a2d3269626bd79bb70907525021f01a465a9673. 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/QT3FE2512606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6c17c7497ab91762bfb30d3575fa01af42b4107030f287f2589f41249e296d7. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QT3FF2509250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57034876809ec8ec596301caddd3d25b3233aaf34bbd446ace983d9b57f651e4. 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/QT3FF2515637.