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 0x42eaa7172fe3cab50dc1d85f36369028c7e2ca3b1e2ca7ae9bc13014193bfe70. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4ca05c70-1401-4f25-9e24-b9d47ba604b8.json and https://artists.proofprofile.net/proofs/artist/4ca05c70-1401-4f25-9e24-b9d47ba604b8.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 0xa37d462c0167ee64584ecee8750736e3525bf79e8b5f8de7eb779b49c66df04c. 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/NZRI11601653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c2235e73e4c1cfe1438a860ac71b951fd1f22adf77555dad77adc7a932a4881. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/NZRI11402219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x697707b56962dbc2467c579227bbab02f0f72018c30f9dc37b182a35551f6c2c. 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/NZRI11402222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4c77d1c5bade6f79a4497549a71ca11a3723dd2f1c9eb48774c5528d23e925a. 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/NZRI11402224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd191b9eb746bf430b3a9a6c54580707f4b018325b6412dd344115fe074eb0964. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/USHM91389880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9df4a7a86957a2f56d2f2f82e32b2194916b163c341d71de9d5879b63710d14. 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/USHM91389881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb526c67d775b56c9e3a1ab3c00b43d43f11e922553409653d823001125dccb. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/USHM91389884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3337d673d21ad953fff32f4409355818993d156ab5dd66c2855eff69402ac568. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/USHM91389887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x722d69ad682c9d0a905167b364fadb561ff902235bf53bbc7263070a09547174. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/USHM91389888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bf1e8809ed13007aeb69b24eb96afd60e12dabc0d87c1c5f0c07e967a0a85dd. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/CAN111700409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47f2fbb1db4b2627da55e554d50a20349d2cff5e2df7c344453bd58ce9c6ce47. 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/CAN111800213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45d2851b87a024a4119619aaa39be59b88d9a04e92c9b49e54f81780db550593. 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/CAN111700154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78d1702ce66da57a7464b5a85edcdf96a2038cb133a79f14e631781ab89fa915. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/CAN112100026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19da0620a56a816a4a9b429885333c704b4bd56f867ae3c73dc71d6d7c6c6552. 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/CAN112000263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe616fd326d4b72a704c84d851664807af816340b0e0f1c8c097138bb65f944d4. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T19:09:53Z), 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/USCGJ2475043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd52084ee71d372f693deb7edc1dbfb216a5288963bb1c3ea28aa1c3830d91dff. 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/CACWV2383933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84717567d7f30591989341fea71cbac13932af31c64b96dcb3d5e07b473fa9ac. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:56:00Z), 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/USHM82447426.