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 0x4d6692b9eb001a9aadf272bc8061709b1cba7328512bfad85ca0916211b15517. 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/892d4b67-13c3-4e2d-a168-a26083f5db9f.json and https://artists.proofprofile.net/proofs/artist/892d4b67-13c3-4e2d-a168-a26083f5db9f.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 0xcab3c1c7e07e31ebfeb04d2ba24adb4488b3cf176302f05c27396d32d9e3bdba. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZTPX2471472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc888ad97fdc780e0baf76017155adff238998c3ac941caefc5b983ca1494a9ab. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/QZTPX2471454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b4c1f44c5ec100b23917a8c457cee832378d932e4edbaeb03e6e0e11bc0c1c7. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:30:52Z), 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/QZTPX2471498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dbe69ba611f099812d1a20c2efe593053ada9991d2be5baaf8be10d0fc53f88. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/QZTPX2471481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ceb973b6adef330fb29b60805126f614f3e652f1805c473963b7ffee9edaad4. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:31:07Z), 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/QZTPX2471487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ee45c52ebf2fb88bfda7216681aeb19be148247bbacaf83bfc2366a157e805. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZTPX2471013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08aacdfa2646a10ef5ed494b35b2c54a74fd648dc29c416633cc5a353ad693f5. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/QZTPX2471460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b82f33becba6e75d8eef66733f350769e0186757c38edc60c31b85354240512. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/QZTPX2471462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2413ffd3a5909191369d87de3d691c61df7ed8d2b47498b31d9c785fba34839. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/QZTPX2471011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa03815d5f5e02819b775934a22d518e0dfed0ef21df33f3c36165040a1709883. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZTPX2471474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6db231b0a0e16e1a235a0ec7a99f18b739176b2cdb6689c218f5dc4bd989e738. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZTPX2471480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07cd79209cf0253e2732b0271aad8f59cde3259336a3144ce32eaa4f5325702d. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZTPX2470426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00be972e716c37337342442b9ee30d0bdad1c632e835d93a102f850e27447d9f. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/QZTPX2470457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a66a8ad11757f551602a47168c988b8a70f1b2b5a14f2d69f63baaadf31d9aa. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZTPX2471456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb8ec4742a8b14344dd88a28d1b2a89a435792a513463fe140134f9023677aa. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/QZTPX2471478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb366e096e3a5b7e41612b5b3ef59d7be977003770d2e928e94dd29ff816ad8e1. 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/QZTPX2471475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc74362ebb6fe1bf1c48fb65c8d2226803929dc40ffd17f8e6f7825dd41128f5. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/QZTPX2470943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29db2984ea0a09ab4fde0cd5ecb36014f563fecc3175411c2fbd3bd50ecb76a9. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/QZTPX2471457.