thumb|Hazy Osterwald Rolf Osterwald (February 18, 1922 – February 26, 2012), better known as Hazy Osterwald, was a Swiss jazz bandleader, trumpeter, and vibraphonist. Osterwald began his career as a
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 0x7bff5e1be3ed034f5ef8118dde80d4b77c4c1ef9b579ffae61f9a5137f416391. 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/cc953ee9-ff0c-44ff-abac-b241a367db3c.json and https://artists.proofprofile.net/proofs/artist/cc953ee9-ff0c-44ff-abac-b241a367db3c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Surprise partie à l'Olympia (Mono Version)
Vintage Belle Epoque No. 64 - EP: Dixieland Style
Vintage Jazz Nº 66 - EPs Collectors, "Trout In Blue"
Hazy Osterwald Mit Sextett - Jetset - Entertainers
Hazy Osterwald - Mit Musik und guter Laune
MASTERPIECES presents Hazy Osterwald: Hits & Raritäten
Masterpieces Presents Hazy Osterwald: 5 Greatest Hits
Masterpieces Presents Hazy Osterwald: 25 Greatest Hits
Masterpieces Presents Hazy Osterwald: 10 Greatest Hits
Masterpieces Presents Hazy Osterwald: Kriminal-Tango / Wieder mal Paschanga / Konjunktur-Cha-Cha (3 Greatest Hits)
100 Deutsche Schlager Hits der 50er Jahre, Vol. 4 (Original-Aufnahmen - Bester Klang!)
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 0xe91f2dc313d393762dfeabbe9e9a5aee12d56e9accb916ffe79c4cbc055f0660. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DEF161481826.
100 Deutsche Schlager Hits der 50er und 60er Jahre
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe91f2dc313d393762dfeabbe9e9a5aee12d56e9accb916ffe79c4cbc055f0660. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/DEF161481826.
50 Schlager Party - und Fetenhits, Vol. 1 (Deutsche Partyschlager - Klassiker)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe91f2dc313d393762dfeabbe9e9a5aee12d56e9accb916ffe79c4cbc055f0660. 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/DEF161481826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69e960a6cffa031b912d773576203c0daa0f4e1fc42a66e52e9c58adab479818. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/DEF161481801.
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