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 0x4b5584ec09819b6f29daa443aa77b8afbfde14d340031daf50590ca147bc7df5. Chain 2 (Bitcoin): anchored in block 954638 (2026-06-21T03:45:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d37f9d6e-f2eb-4e4e-bb7c-d38b9d7e9358.json and https://artists.proofprofile.net/proofs/artist/d37f9d6e-f2eb-4e4e-bb7c-d38b9d7e9358.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Mozart, L.: Peasant Wedding; Musical Sleigh-ride; Sinfonia burlesca / Starzer: 10 Dances
Bauernhochzeit - Tanzmusik der Wiener Klassik
Das Problem mit dem Stimmbruch und den Streichen
Wir Entdecken Komponisten: Joseph Haydn – Abschied von Schloss Esterházy
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 0x5b0464931ba57e4b20514a658de42e2cf40d07f47cda539d31ba43e1400e6392. 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/DEF058231844.
5 Polonaisen Wq. 190: 5. Polonaise in D major
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3206cb239dc9e50c468b245c24e46477421dbf0080452aae21cd731a22c5b1a1. 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/DEF057503625.
5 Polonaisen Wq. 190: 1. Polonaise in D major
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a7f10ddfb7fdbb1bfb16dd8ffcf9acfe4dcd3477896e3bd2cb0029681b7bb9. 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/DEF057503621.
5 Polonaisen Wq. 190: 2. Polonaise in A major
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fa4063d6ed06c7233d94422b3918d05b1a64942fe2b465643a08c254f484837. 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/DEF057503622.
5 Polonaisen Wq. 190: 3. Polonaise in C major
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8d30ff644dda14958c8dacde801af732298886b02d775096c932a50c0ad43d5. 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/DEF057503623.
Wolfgang Amadeus Mozart: Schatten ung licht: Chapter 1: Wunder der Natur (1756-1765)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd0664db01e71764b7d7d355a6d08d929fb6af5f26911c4e56761ab1acacd20. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DELW71490601.
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
Musikalische Schlittenfahrt: 6. Andante, sempre piano: Das schüttelnde Pferd
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6398a033c76533757dae4efc6a634ad3e10c2cb09c244b83c7f007d5d37b2d2b. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/DEF057630406.