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 0x5cb70087f1340ec1c9cbfb951f72c7a82444bc626d2d009ea6e4e55b58a0b1a7. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f05d5fc6-cd91-4128-a4fd-db83cfd996f9.json and https://artists.proofprofile.net/proofs/artist/f05d5fc6-cd91-4128-a4fd-db83cfd996f9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Schlager und Filmmelodien von Walter Jurmann, Vol. 2 (Recordings 1929-1936)
Schlager und Filmmelodien von Walter Jurmann, Vol. 1 (Recordings 1930-1938)
Hirsekorn greift ein: Ohne Worte lass uns scheiden
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 0xf6b63c7ce08d0dfc727422f51cff45e92bde73f4e82b9087340d3f03866e6da5. 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/DEL111200698.
Schellack Schätze: Treasures on 78 RPM from Berlin, Europe and the World, Vol. 13 (Remastered 2018)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd35e48e331eb43d8dd50151366024acb9c4b740f8ff8d56e7f18c11c4cadbbc8. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/DEL111801144.
The Roaring Twenties – Die wilden Zwanziger (Vol. 1): Am Sonntag will mein Süßer mit mir segeln geh’n (Recordings 1927-1933)
Tanzorchester 1929 Schlager & Swing - Schellacks
Schellack Schätze: Treasures on 78 RPM from Berlin, Europe and the World, Vol. 27
The Golden Age of Light Music: Four Decades of Light Music - Vol. 1, 1920s & 30s
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68489a77722f6e4ef917b6859bd59f4db0f51ee4f1e0bdbb3ea57b89a030854e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CH6630753407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x042de7d1c4ef179430ffff1c11318a9b0c095fb0dede6083286889e4eaf51d18. 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/CH6630753411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a3bbb2976141a5bb542ce97468fb3ec78349ddda9efe7ab1d16e4928f8b3e9. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/CH6630753412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a1353b20185449c9e3d55cb6f7305c328103e8cd5365ee8ae14a54fa78d6af0. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/CH6630753414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff68ab5902d7a4af689e2692efb38c43686c00965771322fdb862ae002c90375. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/CH6630753418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e1610132fc113e78aaacd56ab79e6ed0859d246847dc3114d69e46ac1d854fd. Chain 2 (Bitcoin): anchored in block 960355 (2026-07-31T05:49:18Z), 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/FR59R1530428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff2b74adadd46f964cd4a093e81282cbc1d7a62f460c6c49076910a1915299fd. 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/FR59R1530441.
Am Sonntag will mein Süßer mit mir Segeln geh'n (Foxtrot)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefdfe98797da94809f5bf37b5be8b7d6dface636c2bc7867fb6b3eb69ef1cc12. 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/DEL111400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80188eefbc2fd61e94eea8a2b4398cb38b46c1665e03edabaacbea6f13fd2f5f. 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/QMFME1456166.
Tanzdielen und Vergnügungspaläste, Vol. 2
Am Sonntag will mein Süßer mit mir segeln geh'n
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x437241c00be75fa707d5fd404ea823b6443e6fc1a981bcb538e616ff2de55edf. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/DEY472372326.
Das war sein Milljöh (Das Lied vom Vater Zille)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87b115a6c9965277991855bccc61f62ae50f8fe72f1c04b858d5bac24d70c650. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/DEY472372331.