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 0xe84c6c97eb4fd8c0f4baaf9135545eb8488daf202c7516f75acbce65aa68bcc7. 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/901f9c21-738d-4416-b8c6-3e8fcd2c01ae.json and https://artists.proofprofile.net/proofs/artist/901f9c21-738d-4416-b8c6-3e8fcd2c01ae.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 0x59e55d7091111a05ca8c098f751f7654500f469d449b319f9a2a0851b228b0dc. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:03:34Z), 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/USHM82548105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x041e482f7fe5853ead1a19332f5cbcc89a86e08f96a2ca55e6e98a2c9178e4bf. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:43:59Z), 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/USHM82548106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ad3a83e442103b0c3bdfa3b3d259595113f4386d4a8548bae91d37cdf3c005a. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/USHM82548109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f639b2e9c956529f903b5ac997aa8085659223b514bbd40de7c9026985c3dc0. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:49:04Z), 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/USA371660493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x334dd32ef41da0650cb943ac8b3797cfa3637d3c8949695990a4ce4d1b3e1fe9. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/USDY42125892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x600db651cbd7a8f319eaf0587053ca0c307207729ca733028dacd1484dc9e943. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/USDY42125893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ed93fbbcb8820b206227fd667428b4945fdc7878eda34b8ac5b2de31e822142. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:47:16Z), 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/USCGJ2185003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27a26b23260d7910fd0b01873128260d5c9396759348a933ce6a4652f6f3ffb8. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/USCGJ2185004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb85b9639e498dd0228d5d4a0f5f90dc6bc2818a9b5cfebcb32e22a48668d5c78. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USCGJ2185006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4718c4508e6d56567c01f4b4494fb6bb08a48bbb8267eae6f34c30d4d4eae12. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/USCGJ2185007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5368c365170d6e9463c9b87bfa85154b0daa4b3a5cd6b42b90d931d5da2ba522. 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/USCGJ2185008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe88b98b9faa10453652456e18b2138c13f65121c2434c596bffaeb89a0d6e66b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USCGJ2185009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3415d15df7a3aa4afa6c1fd033e94786f77a57ed7b53195c4b16163ddfed0ee. 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/USCGJ2185010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1e2bbfa76a29b6d983c2268cb323c820a9716a4620865ec1f48f2ce3c17730a. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/USCGJ2185011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5de954f6d59cd2e6031128314736af60934794992898ed2f9d279799067933cb. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/USCGJ2185012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b8627966be74910404f72dbe012b9804cf715fd323c46b01913bd6df9168c36. 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/USCGJ2185014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f2d64be0440242459c0f2c71034dd760567f350667ce03f0723a16bfb6d33ff. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USCGJ2185015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a261f4930d9a596f1f74107f767cd686420ec9277f490bdec91ba799a0cb857. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/USCGJ2185016.