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 0xd7f6b704edffa5261adac18706f47b04a8d00c0611e8da67e93f266948db54f6. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/28332ccf-3629-45e3-8e37-1923806205ae.json and https://artists.proofprofile.net/proofs/artist/28332ccf-3629-45e3-8e37-1923806205ae.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 0x19222c76e828fd17d109ad50ff3cc88cb6d3f24e2116a694c59e2b4a5f85e793. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USCGH2025252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc843e0f5a256cd71e89ae620e49dfb9bc97c24693cab816de1e28a9626231b64. 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/USCGH2025255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x609a5a47d8ca3d44c2b9b65e8d8b25b5913317cb475e70cad9ab2c95557f34d6. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/USCGH2025259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62898b39f553ab36584bda8a1cab89f24f6855ab88fc8ce91569c346493d0c0e. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:10:10Z), 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/USA2B1512878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e1a5f27fb8e88978b54286807fd36831cccc0404403b38fac39bc828eda3baa. Chain 2 (Bitcoin): anchored in block 958668 (2026-07-19T05:16:11Z), 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/USA2B1512879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a9d85c540a030a7f99007b7e8752e5b8f7281be53dec962af6194027d921e8c. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/USA2B1512880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e4577c3c262cc1fdfb39ca3f41524a0347384335dc9fd7ab4df858537be2e92. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/USA2B1512881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf231808a06bfe7c0e586b809b23f8fe89b3e6669a787092dafeee10ae918da3. 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/USA2B1512882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x943c1040d8949f2d6be8949f88756d232c4d9793a4769884d26b977a150c73be. 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/USA2B1512883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd517dfac4a5b4cf9b2952fec4b6d8bd058ef876e33a74ae73cfa8c5b7a1ab74a. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/USA2B1512885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7ae97c69047f9bce03c5a08e9f4e87b7632ad3fd56148ca6b5ae0914afc2423. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/USHM91858682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b00784d9c0e6f5990a507f099dc67ea6fa52d07b4368f872977cfeb882362a9. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/USHM91858683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d31a65c63bd5caeeb2bc6aebde82dc10eeabe2afd2f415d8bbb6518f8d99c89. 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/USHM91858684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa595f6b6a1ea95abc87b3607f8ae49e74a85e75284d15bf2b4a8d5b548087536. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/USHM91858686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x737d2ded9b46a0cb4ed6ad2377eacc5ca9644ec844db567cc68c4aab66ad334b. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/USHM91858687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2877d1753db0c4b0765d0ca3b3c125f153c94f7b93d3706b037398e45b4acaf8. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USHM91858689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22e91c5ecd79ac8694c76511d15f82af047e2674ae647e00a33a00883d66f2ef. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USHM91858691.