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 0x7c2a633795e29fcaf173627fea1623e68f3976108715035879ec0108013baee7. Chain 2 (Bitcoin): anchored in block 953795 (2026-06-15T13:44:27Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e10372f2-f4c0-47b6-b4be-3e319f02ed39.json and https://artists.proofprofile.net/proofs/artist/e10372f2-f4c0-47b6-b4be-3e319f02ed39.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 0xe52c34b06a0c2873c054c2744773a26deb83740cb18aa07447e4a144d559b56d. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/CAHQJ2386895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3211f0505ef1be4268722eea5466d51d4938d3fed02251b3b16a88b09e70bdc7. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:58:31Z), 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/CAHQJ2386896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e95f1ee2c959e1dcf7c0410e3ff7f3beab040960b10bea007f9be0199d7bdd7. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/CAHQJ2386897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd1a9863e1f5af5f4a671cce5921a528d605444d8e00d1479150d2cb51777a94. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/CAHQJ2386908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bce526952b12916931d41169677dc291f48fa22bd401e7936e321ec3c71f1e1. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:03:10Z), 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/CAHQJ2386898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x582e7038545abb59bf694a878a887dd03a33e2183f5db989ee108844d2d23fee. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T04:21:35Z), 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/CAHQJ2386899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33b4366b150ec6c5c4939092304a9d1ffc3340c1307fba421d25a495a3721be5. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/CAHQJ2386900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x612ad14dd44f0be45ba3e6fdc564cffdcd3426a44bebd21f7ee06b913b7cb11d. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/CAHQJ2386905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fc6ac0f8c589302474c2f201808709478d262fe916417ba2b8a7db10bb96930. Chain 2 (Bitcoin): anchored in block 958417 (2026-07-17T12:56:50Z), 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/CAHQJ2386907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb8f08e31f035f247c601bbd338a1cf6fe2e060d9e159de65a9c22bd7e9319f. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/GXAEH2300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x997dee98467ad0850c68a84b3803312e719fa0e10a6c698e42f2a5921301fe6f. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/AUGBT2427635.