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 0xf2561024f031ec7f74e71e511a75182ab382a2d5e04edd67c856cdba23c8732d. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/579b8af0-8b34-4ecd-9232-235046c8e50e.json and https://artists.proofprofile.net/proofs/artist/579b8af0-8b34-4ecd-9232-235046c8e50e.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 0x0bc2805fa34191494c5c3213f9bf50191f3a1817643f893c1c7713a47f31f758. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/QMBZ92300745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe1b6ab7132378ed327e2d5b1f0250b2741272d7ed41a8294371c5df3bbbc615. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QMBZ92300746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15503b9ae1c5bf1b18445b6b76853d38fa2ae07ff97942105033fa34acf7a694. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:12:20Z), 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/QMBZ92300749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5182c4dec23aff32f385cb77f75d74bcc0bdde0d1f8d8c1c607e0ede3e423193. 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/US7VG2016337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x051e282933cdd189a82f5485695427c7d880ca82253bd9ebc1aa129c7a70fbd4. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/US7VG2016341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2a57f6130f62114a83169ccbb846769ac9f7ac22ab778ab88940af483f111a6. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZGLM2042603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fef9bcf725c4299c51f8ac772ad898ce118df2a5d1fe880636b7d56e9245a3e. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZGLS2099285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf9a05a9f12ed889a62a743b59ea48cda6086826621c7667c335e94c3f55b529. 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/QZGLS2099289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x456b8f942359bc4898fdf3465d793abd8ed6383219e7927a2490582ca4ed3408. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/QM4TX2230519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03fd7d0df0fae1ceaf5e99fa21618932587142c4e53f87912be8e1ba20a409c1. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/QM6MZ2284116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52971c650b63f1ff503c18482d5e7bcbb9313f843bea76ffffee5caaa4ebaf34. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/QM6N22283039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7fd19862d97d2f4b7a9d9905b63e05578b7cbff5412ac5be72896378cedefbe. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/QM6N22283590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc62d8cea3a9ac6e288a7d626d5dae58eeb46143376a3a035f0d4fedee00ad6e. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/QMBZ92280896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd0a0d402e2e151cbf14e01c815e9e0ea702e51992eaebec769468ddfb5780d4. 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/QMFMF2304125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47f0f134247658edb38aa99622edd360b136b2bf5c0f3717533a079a06be9ad8. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QM6N22523139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dda3f4a9660c5b564bfd883a941fe5f99f9f573ab0fa2bf083bcf4c327d989d. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QMDA72510801.