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 0x39e5db3ef72d0a56104a01377be17be8ed02ef6ce3afc61c3bad7a1692641e0e. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d24eacc3-9083-494d-b6fb-578d2d08d992.json and https://artists.proofprofile.net/proofs/artist/d24eacc3-9083-494d-b6fb-578d2d08d992.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Lohengrin, WWV 75, Act III: Treulich geführt ziehet dahin "Bridal Chorus"
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 0xc92d9d1dfc1e3d29019f488cb96819be2af7967809c7d5170b5eba06c72c6756. 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/DEF059131602.
Choral Fantasy in C Minor for Piano, Chorus and Orchestra, Op. 80: II. Finale: d. Allegretto, ma non troppo quasi andante con moto
Beethoven: Symphony No.6 "Pastorale"; Choral Fantasy; Calm Sea and Prosperous Voyage
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16bd4da2e6f4f6fb20724fa392a16bacbf4f2074cde61495618ea90703868082. 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/DEF058603745.
Choral Fantasy in C Minor for Piano, Chorus and Orchestra, Op. 80: II. Finale: e. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8678f16fcab07d81b879e84711798f5aba85bc5b2fec088574bef353e1ba76e. 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/DEF058603746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc92d9d1dfc1e3d29019f488cb96819be2af7967809c7d5170b5eba06c72c6756. 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/DEF059131602.