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 0x048a59504d9fbb3dc31edeecbf93f0c1bf3f6a3e6648c498572597b6847eb7b7. Chain 2 (Bitcoin): anchored in block 953819 (2026-06-15T18:31:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/feae31cc-42e2-4227-8009-8dc8c60396ca.json and https://artists.proofprofile.net/proofs/artist/feae31cc-42e2-4227-8009-8dc8c60396ca.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 0x5fbf72dc4638ce22ba74eb0086652d590f10973bc2a671fb7f6d3865eb9e715d. Chain 2 (Bitcoin): anchored in block 959146 (2026-07-22T15:41:47Z), 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/USCGH1799775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd133c14ec92671ff1107733af2dff8e7f25a021000fc481cef0c96b93a70a96b. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/USCGH1799777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cd09cb36d5132900fa2f99d5057b6da8fedbf33127de18506af30820d9eef69. 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/USCGH1799779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e2b206d671ce6d572ca5fca1980fe9baa6231415b8c7a0608300c5a2bdb8a82. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:01:13Z), 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/USCGH1799781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x368a2aa54f30df69d07445961bae8951de4ccf73efce82041e8a0fb05afc7f42. Chain 2 (Bitcoin): anchored in block 958861 (2026-07-20T10:02:52Z), 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/USCGH1799783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe66a09ccd40cfaf555c70393e8cf14b91e5730f7625af4d69f048ebc3d14a044. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/USCGH1799796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x130878dc23970fbe9807886ee473c321a09305255e62d27bae628d37c17b898d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USCGH1799800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9773fa06945b5d5c858a7e6eaeaae547d16f74a51ad80ebd81ef677efc93fc57. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:55:26Z), 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/USCGH1799804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce549bb698193101d416dd05a2c61d1c937883dec67adf1e5c635b0c11c40e79. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T04:33:17Z), 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/USCGH1799805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x311e96c611f6ac331f990fac72c28a223b7378ccaf7bac95e9cf7da7af9fcdc1. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T10:08:47Z), 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/USCGH1799807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3578d366bbecb98251c26acb41b4eff311c82a210242c49a78ecc8327a91a597. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USCGH1799808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xead370bddf82eac17c376fb83b65fd5aab6472cda18d81d00b091213c9b348df. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USHM82124074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6da06c7470148f3ac03bbcfca88e36e7c0e2651bb745f2edec5a25f0b0c13b6f. 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/USHM82124075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03d7c0673ea76c52dabb2f9862a32919a08153d8725e9bb1c57904a3759f0f23. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T20:04:38Z), 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/USHM82124076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e30d5bd0853b354f5373e8caca6a8e331ae2e62cef6d2ea1e7c12e694c224b. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T14:35:44Z), 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/USHM82124079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5ebb1af130ea03cf7757229fa70dc0f9e2b44f0dc3770ef2a5476f2de37cd97. 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/USHM82124083.