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 0x1ebc86935bc696215c85654eda349de125cd7c7705149f467a9ed4d9db4b4899. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9bae308b-640f-4b04-aab4-ef1914eb586b.json and https://artists.proofprofile.net/proofs/artist/9bae308b-640f-4b04-aab4-ef1914eb586b.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 0x7838f15b788af8c7a47f339f29414243e02d190e6e7eaa00542c6db26fb3a0e6. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/TCAHY2402223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77f09fc766ef64dedc774efafc25346b91f5286209311cbf3e59953abbfafb3b. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-20T00:29:27Z), 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/TCAHX2492376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1691643fe00b3ca07ad4a931544f63ef89a01350f59972de74f5a8131bdc629. 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/TCAIA2416090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf86f05c0b8f0542a942aad8d1f6d5f48f967c4c8f96d45891b7c3d644954a176. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/TCAIC2426935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe68f3b2a35d2d0638c11642d67f8455c3bf1474398cfdd1bc68017c49e6dd8bc. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/TCAIG2496246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x082a410566239dd5c27add5ea30d8aba34ab0f8b08abae9f83c047495db23a87. 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/TCAJD2449596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d57c8b0a51a9a46fe2964b6741b9899503d60f24357c4be4f42aad22bc5f41b. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:32:42Z), 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/TCAJH2516154.