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 0x0ef7d8cf3853520e9d5fd96cb2a6d4a7ac65ae7c1c4143ef50dfbcaabbde8039. Chain 2 (Bitcoin): anchored in block 953889 (2026-06-16T04:57:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0dfbded3-bd7a-4013-a20b-a2b2e92a12a3.json and https://artists.proofprofile.net/proofs/artist/0dfbded3-bd7a-4013-a20b-a2b2e92a12a3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Franssens: Journey Under Brilliant Skies, Three Etudes, Old Songs, New Songs
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 0x31cd88abf81ab8a6fd0259d888ff2ffdb3082d5851a1b6bb31fc5fe2a090ff5e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NLB152100536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1df863142ac5626ddd72f2e15553d284f7449872b7560f8b42fc0afe6e9999d3. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NLB152100537.
Fantasiestücke, Op. 73: Zart und mit Ausdruck
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f7a5206c0d320ed6f35676df865b4d6fa3d5be2c70b19b8b4eb75ed02a9dc00. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLB152100538.
Fantasiestücke, Op. 73: Rasch und mit Feuer
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf8a55aef3a546b4e2fe3105fbd4333a93d573f4d7be9fb337bfa6d679e21243. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NLB152100540.
Piano Concerto in D Major, Op. 61a: III. Rondo