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 0xad8f413694ff1d6127f5e01b40bb0dabff62417c52aa8fa51c2d3d189157bbe5. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e73fe2f7-8383-4885-af01-bb8d15ab4fbf.json and https://artists.proofprofile.net/proofs/artist/e73fe2f7-8383-4885-af01-bb8d15ab4fbf.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
24 Préludes, Op. 11: No. 1 in C Major. Vivace
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 0x1cff3a91c7b33f7e698c35bbc7b1561d3773f90cd00b80d90721ac5b7871265d. 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/DEXF62390402.
24 Préludes, Op. 11: No. 2 in A Minor. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8ecedfbea6767b689577b301e0a3d3d81827d0fbfdf2f61c0cb1d3a1384e8b3. 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/DEXF62390403.
24 Préludes, Op. 11: No. 5 in D Major. Andante cantabile
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54624cbd21e946399b97a6b142cf3a903707129fd5bfa3345317fabfea709848. 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/DEXF62390406.
24 Préludes, Op. 11: No. 9 in E Major. Andantino
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e30ea5e3538cc37945c84c2cf296b826d89a311932fcf0124261366e92f34c4. 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/DEXF62390410.
24 Préludes, Op. 11: No. 12 in G-Sharp Minor. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73ea6840a8b01556250480c7b97ec41f240f693543a01c5c8d9f3132746613cb. 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/DEXF62390413.