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 0x040ec3710884a5c9e8cd15ecdee42b287ee6700efa6839f917ffce8f22a50bdf. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cfbe496d-14a0-417a-bae1-0a4e092ce3a8.json and https://artists.proofprofile.net/proofs/artist/cfbe496d-14a0-417a-bae1-0a4e092ce3a8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Vintage Jazz Vocal & Swing Of Germany '20s, '30s & '40s
The Golden Era of the German Dance Orchestra: Berliner Nachte, Vol. 1
Suite Française (Original Motion Picture Soundtrack)
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 0x9070d6688dddf6bacf56beffbf812ab2cc51de0c9b40fc2cd40ae0ae87ccdef3. 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/USSM11500636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2c15031881b2f19c8b706d859359137e9e4dcd226d692e00e67a7803766a9e9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DE1A42140646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa07d1665a19a5d974ecd1faa28fd5b4b35eea9060c34272e35cec58b8b675de. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USSM11500637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7663576b7824c79e3145780cc855968eef6fc793214238f83ae3d3acf7dfdf67. 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/USSM11500642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c076ece56580a318e94a7e56512964cb30225abd718fb937972ef155f2f1b06. 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/USSM11500643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1d2ddbc260c4e6af7dbabca5f1cea7894651661849246befb72bd93547a856a. 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/USSM11500645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62952013f1f3d9dbc017c95e80bbd1125ae7867f38bc520707e93009f1231100. 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/USSM11500646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8182a2def35d3edefdbba5b6c53d0cd53363fd0e7d14a8322afe8e0e252e2cd9. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USSM11500651.
The Golden Era of the German Dance Orchestra: Oskar Joost (1930-1934)
The Golden Era of the German Dance Orchestra: Berliner Nachte, Vol. 3
Eugen Wolff Orchestra: "Peter, macht Musik"
Leux, L.: Es leuchten die Sterne (1931-1942)
The Golden Era of the German Dance Orchestra: Oskar Joost Orchestra (1934-1939)
The Golden Era of the German Dance Orchestra: Musik aus Berliner Cafehausern und Tnzpalasten in Originalaunahmen (1930-1943)
The Golden Era of the German Dance Orchestra: Berliner Nachte, Vol. 2 (1936-1942)