Wilhelm "Willi" Ostermann (1 October 1876 – 6 August 1936) was a lyricist, composer and singer of carnival songs and songs about Cologne, primarily in the German dialect of Kölsch. The tune Homesick f
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 0x60ad8c78561f75c0545de13c9ff542dcc2c1b8d2997128b95dfb3e303773cf72. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ab1232eb-de9e-477e-9eee-366d7b37ad2e.json and https://artists.proofprofile.net/proofs/artist/ab1232eb-de9e-477e-9eee-366d7b37ad2e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Karneval wie Anno dazumal: Willi Ostermann (The Original Recordings, 1927-1935)
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 0x1bc7e89504c5af73a2a217bbe9b5ba6720c2bcb5276509d1d562061f1059697e. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/DEL111302075.
Och wat wor dat fröher schön doch en Colonia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f890dfd7b36e86cb57b468f17654eb62acf2e48b0e3a8b68db70c7f490e90c6. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/DEL111302095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e399c4e914ee8e580f85b033737bc71b106247516e2a28702d16be0bb43a0d4. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DEL111302097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc7e89504c5af73a2a217bbe9b5ba6720c2bcb5276509d1d562061f1059697e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEL111302075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x377399a8764bcfc3b3ae4d3c27ca6b5fe99ca6e0976fbea746dd5e186c154614. 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/DEL111302082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f890dfd7b36e86cb57b468f17654eb62acf2e48b0e3a8b68db70c7f490e90c6. 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/DEL111302095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e399c4e914ee8e580f85b033737bc71b106247516e2a28702d16be0bb43a0d4. 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/DEL111302097.
Heimweh nach Köln (Ich mööch zo Foß noh Kölle gon) - 50 große Erfolge
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f8651c860a343465086c21f9e8c60973f2f6d462e16519068e115fb30708b57. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:08:33Z), 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/DER751647801.
Rheinlandmädel (Und sollt ich im Leben ein Mädel mal frei’n)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49674e407b994f9fb7607240846325b87057d40514fc360d7c27bb507931930b. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/DER751647805.
Villa Billa (Jetz hät dat Schmitze Billa en Poppelsdorf en Villa)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e45744290c81c98987eeb18785c4168d08c193f1f859ca8fe7ce46f7711c3ae. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:26:12Z), 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/DER751647817.
Kut erop! Kut erop! Kut erop! Bei Palm's do ess de Pief verstopp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6407740e26c5846450a8a8a99bb21973e2d57d3b0426bf9e97b7b96f1b359656. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DER751647822.