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 0x68d6e0a198671f4eae7e27e51d0164bb29fb27d3dc3bf0c68ac2a40137240229. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6551c27e-f852-423b-87fe-46703ad63904.json and https://artists.proofprofile.net/proofs/artist/6551c27e-f852-423b-87fe-46703ad63904.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Divertimento in F, K.253: 3. Allegro assai
Bläservereinigung der Wiener Philharmoniker
Academy of Classical: From Baroque to Beyond
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 0xe31da444337d11445332b3ae4e3c654e77b8d42fee6dc860e8bfb3d1b367961a. 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/DEF057901143.
Bravo! - Great Classical Recordings: Mozart
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe31da444337d11445332b3ae4e3c654e77b8d42fee6dc860e8bfb3d1b367961a. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DEF057901143.
Divertimento in B flat, K.270: 4. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a00587114a27958120f68f7729ffad0967809d50682643ec946adb6dd25cd5e. 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/DEF057901154.
"18th Century Composers" - Mozart & Beethoven
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe31da444337d11445332b3ae4e3c654e77b8d42fee6dc860e8bfb3d1b367961a. 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/DEF057901143.