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 0x95c2ccc190a0fa5b0950adc8eac0b60ed21d2664b5894d827be8c09461ade2e4. 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/e23d39b7-c514-4dfd-9d3d-0fe4793b3bb0.json and https://artists.proofprofile.net/proofs/artist/e23d39b7-c514-4dfd-9d3d-0fe4793b3bb0.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 0x6b93d08b89b6af3b6f3df9d3d76ce4c659cf05dc8f5eafc0816e442dfa0bff01. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/USA5R0513314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x571f07f29f1c938fbec86265ac553578f601f77ea17506a3aea1317f3e6e95fe. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USA5R0513102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aa406b049c5187ed60378dd96224a59b14eddbd41887266da4b422bdd5a28eb. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:35:21Z), 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/USA5R0513112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5df0c5d081864f3e0710ee3bd79d485974709c53d95694d09c42d0fdaab15538. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USA5R0513117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf20fcece6d6fd934d8e6c3ff7c478d2d0d86db8c897330b5a04d9d44e72a398c. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:54:24Z), 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/USA5R0513125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x739ca15204076cf930ffe8547e6d42ed8cbc514628306ccc9daf13628951342b. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/USA5R0513001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x243a4b8885da76d59f0a528f81c27f94e54e3f8f07865ad752dfd28afb4c9138. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:07:30Z), 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/USA5R0513005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36d73abe1d1f8918f59e13b70005844dbf8e5c01700db042300bb3b7c4506058. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/USA5R0513019.