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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x957b9a894decf6162d710d28795a0a01c9b8b92d312f58b50d66379e84023d74. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7d16f103-0d7c-496b-919c-54a716505731.json and https://artists.proofprofile.net/proofs/artist/7d16f103-0d7c-496b-919c-54a716505731.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cf7d246086d18a601e7ea85b0a176ebd7e2ce366695bd7ba2989ff0499166f3. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTAY2257661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb53b6777a5ba94fed4bbbb457fa065220a5bec41f2f560d246fa1c3a3767e6ef. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T10:48:42Z), 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/QZWFR2384244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x152de6e00b1e573a8c0b133f69fb72dce47803c93a3a69fada15203683ab1386. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:53:21Z), 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/QZK6H2486781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d29cc0438bb4efeee6ff8afbc36cec17ee25473864a58e132a63b2965096b9. 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/QZK6P2433148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ca9e3bc6db10050ed9fdfe98cc768b58f61d5c8dadce7e4b787d36d15a1ccba. 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/CH7811113940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2e6b67d20432c2816ee80fa8b6c439348ad528e3ab5ee5be5a5b7ad93e8ea5e. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/CH7811113222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f64248700a122fc1bf8e0ff560324ad1aea8af9db5669dc110f3da9bc5996b9. 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/QZQAY2572384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x131dcc68fbe241fc2abcf441586d617d0c602fe682ec327f3864374df0fe3827. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T17:52:56Z), 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/QZQAY2589715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0e42af5b4091622c12549888fb28bf47d6fd0bb6c60bf67df9544fcdc3459c6. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZDA52218482.