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 0x2879774d0f42c23f5d0ade6a9b5c7fdd6a36096bd9e9e7e5b66e15f4cb7148d3. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d0978a29-0025-4ed4-87d8-d941f4ea7022.json and https://artists.proofprofile.net/proofs/artist/d0978a29-0025-4ed4-87d8-d941f4ea7022.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 0xf341186c02570b8d33464d2d6d855fc556255b54004fd7ad99b20f1c61f9a018. 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/DEH742408083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa286f92482782f27e63f2db98377f28a687a2412fdc70bccf3cbc549faf5a871. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T02:43:06Z), 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/DEH742408084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x060b8111917814e81c85c6be33e64fb9c11217395d1f41da4290bf6a5d3496e0. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:19:19Z), 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/DEH742408085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51714f02f3312cb268a68723816d71363a82c4815b4e94de7f9b280673c740eb. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/DEH742408086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06d13fbc26d5cf52c58b3364b504d3ab5268042cca7ba4e07f24e646f5efc4af. 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/DEH742408087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x825dd9d648d6cd4971b83f9927801d2309cd7f37aeadc71ab3eb279dcf23c2fe. 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/DEH742408088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb79d15822398cb5012346db13fcd8cf1f62e9872abc6d0ad9b625422487b01b0. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:22:48Z), 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/DEH742408089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64d3a8827734230363c812ed5b0bfdf5ea03a3db4ab25f774c66cf9bf2edd581. 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/DEH742408090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x712c738e0bddac18e28da82bdcb3c513fb496cecc845a5f8db98860fbb104fb4. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/DEH742408091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03964a72d1e07cca9594099850141413d5f8b5545e6cd3f500e1a42e3533f8af. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/DEH742408092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x478c022a2564ce4484af7b4074e50b5261ccb3929099839f17df56f0179f1918. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T19:00:37Z), 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/DEH742408093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc8498671d260f16deae1c4b73fc065a6094daa975b0511748d9d45ef550cae. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/DEH742408094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd94904f3945238ee85f3d4544489318c2a98152b0879e1639fb5addbe8afaedb. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:57:27Z), 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/UKCUX2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa15c8e39b0e572e1342692fda240ac442985abeb58023391e38cec437cd80783. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:51:48Z), 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/UKCUX2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fea31bd68bd782d18b19b3a417279ebbf71e1a98f331b35c32e492963743a1a. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:46:24Z), 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/UKCUX2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x120a1900ab77dac1b2a326e270bc17851102a239c5f2a43c0fc1b07b011b17b6. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:08:56Z), 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/UKCUX2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d522cb2891e02775dd56cf1d6d847bb0fe88d64e2c79817fb419a59e9340bbf. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:36:58Z), 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/UKCUX2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2342f41da3c91f47d55d5e28b4f8e26e9e2841de8fc5829427ee93d617c7478. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T06:50:14Z), 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/UKCUX2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a053597456fc90a25cd527074e4a87336fe8da773f45492a90d8524cb043fc. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/UKCUX2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47c5c81b99b9cb1485deed00980361c7f0e4851ce3db78c398c70e009b65fb1a. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/UKCUX2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f00a27de27d28f10bcbd456bc3524c2594fa8666276a31090e096ff319a7bc4. 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/UKCUX2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10dc806ef13b70d033699c0a65ba77871bde696e42f9d5b2646a4a1992710df3. 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/UKCUX2400010.