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 0xc6488ecc3e0ac9695bf671ec696126a43429b92c01f54bba191769e5ec8374b5. Chain 2 (Bitcoin): anchored in block 953620 (2026-06-14T09:36:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1d81c9fe-378f-4a9d-82fb-9258958d7407.json and https://artists.proofprofile.net/proofs/artist/1d81c9fe-378f-4a9d-82fb-9258958d7407.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Airs Militaires Anciens, Marches Refrains Batteries De La Garde Impériale, Fanfares Royales Et Impériales
La Marche De Robert Bruce (Guerre De Cent Ans)
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 0x8183e7d1d2560e0bd8e6db715ee230f98ef77622b32c05ebcc88c1d928c3b2ee. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/FR6V87500219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0410a0fb780c20404a1753815da1d54e3423145c2fd33297cf33539c61765ed. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/FR6V87500220.
Marches Et Sonneries De L'armée Française Pour Les Cérémonies Officielles Civiles Ou Militaires
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dd13b963fcfa54fcaa767f4399e628b0a2117748d13e9cfdda1575a891d7ee8. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FRZ708000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x538da6049272a1276b17fc69339d49ea8fd6f28fa47ddadb025dad029e514675. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FRZ708000013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6946ff95f3fbce91dd45cdebf6ab26e5e43b522e658e24dd641ab894a85ed118. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FRZ708000014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc508371e2fa6771a134f7fe6d0093228bed4f925f8edf44978e0b2912a779201. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/FRZ709500191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2b2b7b08ddd49c8b437ceef48dfb4f8700bf7c9d2c26f6db5211ed2a1d0aab4. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/FRZ709400320.