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 0xcf79ff60779af0e1a120f1899069a0a0fc0122fb67cb1c4bc3d97d9076f0c1f1. 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/064ec38d-3134-49be-be7f-b9cd3c2d9654.json and https://artists.proofprofile.net/proofs/artist/064ec38d-3134-49be-be7f-b9cd3c2d9654.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 0xbf730d1877dc9ab31a47f699254141a73157d81a59d2c344a7f71a97bc2eb1bd. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/CH6541737384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x381872d41a5dc8b48014d0ae1da6e3544d75f395249c1b218adf57ee8e4c9af8. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/FR0U91701358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aae9c3c273b3e6429b149bbf322f87eb554a89cf2d1bba5cf8887ee0d6cf065. 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/FR0U91701480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x598a72d02bf5dcb093e994eb97c25f7a4be267c655eb0107c724990a5198c90d. 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/FR96X1846370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fa4520654e040854e491e83b5f2cc94f58066c2f21d47dc20ec408731166c7f. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/FRX201822371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb90fa2b28836c193eff0be7bb6c236c2b2a2919e824c7441a2834d08231d624e. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/FR10S1989858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbdfeb19f23c720f89e13bc508277336fe1f70776a5fb02e504d6d37f636f34c. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:02:15Z), 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/FR10S1989861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3afed1b29da8ad8ad65bf187e7c518982b602652214889fd5870dd95819abb5. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/FR10S1989873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80d182420c49a42402c2c31d5b758f7949f3e4e0d8da718b10885e0b84975c60. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/FR59R1974903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20ede999ee1ecbe05b4124c364eb38d7f804efd594be195d9802228b1aebb90a. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/FR10S2089642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x506b91b74fea8e1c4a438daed1410ed35ed630011732e1e07d6b454c653e3b2e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FRX202045430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a36c5b4618a97719d3de0b78c122d0be852689ed493cdcf1cb3214aeb29ea3. 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/FR2X42226971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x203e6c1d1a20148a10221c716d19aa3648340b464af7ea411809e04cf39957f6. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/FR96X2261060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1e1e7896c15ccfa80860eb547b80310c1435e899bbb863e71ba721d8741af72. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T15:54:36Z), 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/FR96X2261063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a36c5b4618a97719d3de0b78c122d0be852689ed493cdcf1cb3214aeb29ea3. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/FR2X42226971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x388f9b32829693e582b63c545b8ae94917e557e71a4bbd4c78e8b234e9c954ad. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:33:21Z), 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/QT3F32541179.