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 0x9c5072eea31a3d093df6b309d40c6ff242328dc4ac459a4a426ab7e8ccb2fca7. 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/9c045402-71f0-4c42-81ca-e26a317bbc65.json and https://artists.proofprofile.net/proofs/artist/9c045402-71f0-4c42-81ca-e26a317bbc65.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 0x027e75cd66c5fffdac383a9e3145a7e0c3bec013515dc59295b84ff3c9f08870. 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/QZDQH2372109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd50cbf9bf1b556ed835781042d853969da6fb25d9fbca676cf90a5640c2fa41. 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/DGA0P2325036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1139cd55436ba4fe9089dce530053598fe9e0bf98b613d3965317aa8ff68315. 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/DGA0H2394753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x083141a2366846cf82282cf5f17fa161f6144c5b2a7763d3c505909351a75fac. 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/DGA0M2322801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77943b7bb66bb1e499814db3ec93f3b40af5cf4a017452d03229e9a68ddc429a. 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/QZDQH2377338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4febcd7a7e1a1ff5bde39aed5f93c0d1673d36b57b933eb4d9c2c8cd6be18de0. 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/QZDQH2374559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb786f8db834703fa3ef062c5f1576c6d7b43e0acb6956fe9ba07f796d9160c9f. 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/DGA0Q2382101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88c44fc6ee40b68e6270d1be73cecfd8082bce7f8950f1f6b1157d61e682016a. 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/FR2X42414003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43bbef9cc5b54cc0a81a2e06d60cc72d9b6a024f39f6c7130b111d8a844012b9. 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/DGA062467535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac2e4a31f4dac48aa66c1803e56091ef73e2dc8a539a41fe9effea6aa03c763a. 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/DGA052496299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34316603f9c45b7ab9c3a0a9b477daa5bfd96f689cba024afcc3362c91bd9059. 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/FRX452480244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x714992f2a78e40a9f9d21e024d7b44b3a5ea0feb4fda4b556f1d1ae07b49fd90. 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/FR59R2425247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f6bfcb35563dd34c78fb8e562e1ab8cd704d4e5860680b377c5ddcfed6d985c. 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/DGA0M2414038.