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 0xcc7327253a5e9de0bda2901915748cdbaf15d6c957596836e8aa5eed56db0a74. 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/95810bc7-cda2-4a88-89d3-21da56705b87.json and https://artists.proofprofile.net/proofs/artist/95810bc7-cda2-4a88-89d3-21da56705b87.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0xbbea804fb22536397bd0623045d9ab018780a18492ab966dd9b8bc859d94508d. 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/BKEZY2400344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55346d930386f31cb908b9f9fc8e0b863613a5c5c8b306db919352e8826535cc. 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/BKEZY2400351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9916dff14e332ee6cab53c551550274c5ddfb6e5d41eefaab9d2449cc43aabe. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/BKEZY2400407.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64f8f74aca264b37b108a3d710c4d8a63123baf84d3950d2d910b39c324eed7d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BKEZY2400481.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31f758d80bb81ff2889e274b7a3996b11e1213166ae019ed682a613bb7938fda. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/BKYSG2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x765f8cd163c94a967cee78eb6988b5a05b592b291ad54ade4c46e468dd8fb042. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:03:52Z), 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/BKYSG2500030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c4cdf3f67be06613be2adad3b93717f7bed07d2a5119b4d4953854cb6174c8. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:03:00Z), 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/BKYSG2500194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x567f319a5735aefacafe55c723959055a58ef521fcf0e06cba087486ceab6941. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:38:57Z), 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/BKYSG2500323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf1f6b02e0b24bb57c2d1e8e3811e4362f25c9eff35fbd89504a8bfb40e30a4f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR2X42578038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f3238f7dc663570bbf19c8109df0f57f304757ad43eff2d5d5bd3e0455a2d11. 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/FR2X42578039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc47767b27ad010d10c996761b9ed0c91416a4418db630407efbc9794f24ce890. 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/FR2X42578040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x897f172ff9dc0538bfdac4cb18d84680708169c82c75f1ddc36cd468fa9cce0a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FR2X42578041.