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 0x267163f241dcfc17342cc2ed1d426de905b2f97073a3fe2b25ad659818915f10. Chain 2 (Bitcoin): anchored in block 953610 (2026-06-14T07:58:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1461493b-5571-48c3-87e2-795c03903d17.json and https://artists.proofprofile.net/proofs/artist/1461493b-5571-48c3-87e2-795c03903d17.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Strauss: Emperor Waltz, Waltz on the Beautiful Blue Danube, Overture to Die Fleidermaus
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 0x5d449fff73833a9b7bc02f3d4f8dbb00dc51ac30dc2e368848d869994968b48a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USCMG0303240.
Waltz on the Beautiful Blue Danube, Op. 314
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x318a0997917f351666ab1ca1489fea6980c629dc4226f2119e4926c0e4176940. Chain 2 (Bitcoin): anchored in block 958496 (2026-07-18T04:43:53Z), 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/USCMG0303241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbedc624840745bebf19b7fed4f0f2eca744131521f7c8c471bf0403bb2439e41. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USCMG0303249.
The Strauss Family Album: Viennese Classics, Vol. 2
Gold And Silver Waltz (Gold und Silber/L'or et l'argent)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2424bcb77f898317f874269f22cbf1fd581f80a81d36abb8ad50bb1ce342d861. 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/USRDG0112273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa8a360e952e9bed29bf47683e167a6fed409abf2806816e22ef6210830c225. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/USRDG0110379.
Johann Strauss II & Lanner: Waltzes & Polkas
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a580f7ddeb1be3bb3ef48f4fbdb8dc099de6d2936389fb13ad747e4a97833fe. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/NLA508211003.
Fruhlingsstimmen (Voices of Spring), Op. 410
Spring Classics: Classical music inspired by spring
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5570cc8c59510e2d7451d3f5f0d0fe3ab60acfefbf720362b32c4b40817c52d6. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/HKI199194212.