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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x536d2e4e0069553cbf96567416a726c791602074d5481a2301c447e845f60332. 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/8e8eea5e-8f96-4c98-a02f-1e0146377eea.json and https://artists.proofprofile.net/proofs/artist/8e8eea5e-8f96-4c98-a02f-1e0146377eea.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2edbb859a1da5eff520c690c987b1bf2803757ccb2eea2c369c4573dc24fc17. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TRASA1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6f5be9841791bca2eef22d3a3bfeca7a7f501ad77350932ec581466ec19be67. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TRASA1800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x398e5adfe65dac9b887cc3b1996c9ed7047c3509d4cf79d470e7560fc1f766d4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TRASA1800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbda5811376f5009651f1017d7b857900ca2f55f8f0f2698793e3c2709f45299e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TRASA1800009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a6de5eea4ee889f6a29f2948390986d59a4381080104904c505228aed4fccbf. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TRASA1800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabbd8d42bdc2ab7279eb9cd361bb72916b94f239f0bb9ab94b838180e4b0ab7b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TRASA1600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1ab2102adc09c51e58cfdf3193a77d7fe15a613073c801c1119413d289655a3. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TRASA1600004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc842b32544605a42be68c0d84d411a515af87908fddc110e5bf5bde5f834e82b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TRASA1600009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2530594bf841bb2130460d46364bce5dd5b47b3a265d3e831511e2ca0c00bf09. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TRASA1600016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf30b4033f5a8f23013b156921a41840943f71209ce4b65bc3a548f3e73b63d4c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TRASA1600017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc16feb06a10dd2601b26f7a7b171872cf541912a1e08bc5aa5cd29f8232933c1. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TRASA1500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95824de37231d65e2221d405c51a4a7208d221858358681fb21a8f4633366700. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TRASA1500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59f0e362e589f0854c1aa75daa95fe6964ca669f0402c86c98ea050c01060284. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TRASA1500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0109f529535837a67b22db0ab7e1f4645542d179d7ca2717e04f7e6265d478d2. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TRASA1500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99809a561a005f3930a54f659006e65822b80bb656243c6e4edf41fccb05c824. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TRASA1500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x648153554061691086921dec5a6161f672a69249cb1daa4b74a541ecdccb7c48. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TRASA1400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x312521cf6033940207a1f0746e7537e3c3ea00efe9192d147410caaa6cecbbe9. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TRASA1400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa82f4b3376fab356e4ef0c7d514ad0302a85bbf87993f076a30b729ffdb9e485. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TR0341000277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cce9272c573fbbdfb1537db95e3d1a716e170b180ade6a85553687f18c27157. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TR0341000268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42c5e196eba809b495239f01db34438280ad473cf08dacb275e7ceec848e6ec8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TR0341000276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe98fe24d633f6636ed99395cf4d99e0668a560f906ade559ffe9457086cae837. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:51:48Z), 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/TR0341000269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff230c3cef8c3297a2934fe0a47135014ea0cc86b76e3e7c834025c29d87e219. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TR0341000266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fab242089d0caf887173185fa2660e71ff96c5e458efda1eda8de4f5181173b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TR0341000273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3586b107f4b201df9543fd5ff64e257cc09d6b85042e042908db2e74f95d9bf. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TRASA1700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77c48ee9463120a75aea30b579f4d013034dbcaff440a4bff3c9b5881f99f222. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TRASA1700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01f7e56529c064ff7127a262f275c24f6fcd4678d56714c38ec62be43b98f960. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TRASA1700006.