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 0xf3b066b21bbb014014d32706bd6830273b73a9ea1a6a6a62186b2edf9a4e008d. 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/ecd56faf-996a-4c1d-8331-7cfc3dc1b82a.json and https://artists.proofprofile.net/proofs/artist/ecd56faf-996a-4c1d-8331-7cfc3dc1b82a.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 0x615c297691c45268e2c1cf80885a78eb679f3c35d7dbf35f013e2eae41ec975e. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/US2Y30605652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e3d41009eed3fedb1d4212a8951bdacec0b95c79d693f7c8ac795db1966d380. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/US2Y30605653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02df1feef0592d35a2ef63c64065bb52e256108cf2956af469d464e5b3178220. 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/US2Y30605655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9320d8d50ea9058742de4457bf2fe3bcb5bf5b54cd8f3c8416f7d45ad9ca99e. 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/US2Y30605656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca0c7626bba2923a38ce29d9a24a5f8ab78aa41643ebbefad7974cb85473a055. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/US2Y30605378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x637a6118e5dc4d6a1c9ea31507d97f7847fc0106ad7de538a20b65ddcde55b0f. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:34:08Z), 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/US2Y30605379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bf2f2146e7dce5512d570377937c01659c11dff8a16fc6bcd2de184310f207b. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/US2Y30605383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f60eddda3de9864ebd71903e8987c853dd087000ea51953a92c10c4fb983cb5. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/US2Y30605384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x231770b9e9ce5f6c708f3df0717410a36d31d9ed619340dd9cefb4df149659c2. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/US2Y30605385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb84456619058df966fe434760e1ce471203a8bad030c6ccb07b4a0319705edfe. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:49:14Z), 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/USA370995760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe951c0a4482eadf50d5969ac51e072d908d474d0c9b104486aa577b319ed9179. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USA371316882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b91fa11ff379196ad60034fd3a9cc5e8e98d1acf5d736e3ce4a064384e82533. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:38:28Z), 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/USA371316890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f69356212dda0554e460a87910287129cded89be43fbd8886e987b473f994e3. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/USA561165940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x737755bc8e3fd1eb1f693371b6fb30fedc273600d5ddc01bc84eebd2d549ba05. 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/USA561165941.