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 0xf07e691bafb2d14daf739bdbab397474b0e301ed1b8c3e2bf965911878efab18. 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/538e6223-b5a7-4a2b-b495-71ef3f0c8ca9.json and https://artists.proofprofile.net/proofs/artist/538e6223-b5a7-4a2b-b495-71ef3f0c8ca9.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 0xf301efd5bd0ae3608fb8e4d44f417d1953ef0459912dfa62ec300bf1f94d3b2f. 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/DEE861000266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82535a427f1a050b51705fce59874d4703f26ebc9858241b57710ee1581478fc. Chain 2 (Bitcoin): anchored in block 958660 (2026-07-19T04:21:53Z), 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/DEFY41400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x026f83c841eca60b998a490b1960934c74787954b92a55f59199d665d0a4b085. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/DEFY41400025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6411c45c9b5a5fb95980dd7dbf9bfa439ebb87712f963e1b38a130ea7b2ef4e. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/DEFY41400036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ad77a318ae91000a543d84373071c50d986cff0383a8348aceb99decc9f4d80. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/DEFY41400039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27b9d3fff19e00928229d20856d2c43dd6b18c28e3215076c82281578a92f042. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/DEFY41000042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a63f4f4235f1fda4a6c77c42cef72f8f9fb7c4727f4c4207e8e1bb9d402612. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/DEFY41000047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16824728e6c3c6219aa5a23e85859346092f0e39183b8e96541bee5d44aea772. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DEFY41400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25a074476b210e5f578f9c11c6b901a4117212578b01464221a5148e52ea5510. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:28:55Z), 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/DEFY41400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62726cf8e3166b67e9a143372593379b2d9c3c8699b7e5653a50ceff1ebc6183. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-17T00:14:59Z), 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/DEFY41400052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1de39fb27cd91b7b95a2cc7e9a2048caf7cfce0490f38f4725637064b194c13a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEFY41400050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0586a2089685fcf44b5fc26465e677722137661752cfa28ec999fc325394a14. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/DEFY41400038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8b0795a29afc92498bb49d5b9e86702acb72eca325e1e4d7e396ce9193278f0. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T10:09:30Z), 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/DEFY41400041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa03091ce14610bd7dd2dabe864dffbe92fbc5b7f17b21c0fccb7576dbb2e211e. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:03:45Z), 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/DEFY41000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98510a52ffdaef3f7bd084f970d4906054d8d25601409ee799a35092253548c1. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/DEFY41400026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b00c7fec7428e1f5a2e16532d7198a24a70bdf501c46bb21eb0db0915fa5df8. 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/DEFY41400045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x232cb203518cf4527676a9e8c2641850442a7396a91dfc611ec09761264525ac. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/DEFY41400096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60c8970a52d6aaf046daba5616eee91e9b94d3e1ce968e1f08e93fea71eca113. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DEFY41400099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2736646752e4ba2d56538c1c37c5d90a7f3714057d4339a71cbefa31f185743. Chain 2 (Bitcoin): anchored in block 957591 (2026-07-11T17:21:30Z), 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/DEPI81906241.