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 0x26237b61aa17e4a3439e715331b15eb8040f1a937e1dcc0a1aabc09979089238. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0d98ae54-51a7-453d-9aa4-52202b4ecd30.json and https://artists.proofprofile.net/proofs/artist/0d98ae54-51a7-453d-9aa4-52202b4ecd30.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Reimann, A.: Cantus / Ollea / Solo for Clarinet / … Ni Una Sombra / Arietta
Pfitzner: Lieder (Complete Edition, Vol. 2)
Reimann: Zyklus / Kumi Ori / Die Pole Sind in Uns
Reimann: Per Violoncello e pianoforte ed arpa
Reimann: Kinderlieder / Nacht-Räume / Neun Sonette der Louize Labé
Pfitzner: Lieder (Complete Edition, Vol. 5)
Pfitzner: Lieder (Complete Edition, Vol. 3)
Pfitzner: Lieder (Complete Edition, Vol. 4)
Dallapiccola, Hartmann & Schweinitz: Lieder
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 0x19cdf4a4dc64a63f99f7298df05f62eb19b552c3f6329b5aae027cd2db22e218. 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/DEX990641315.
… wie ein Cherub aus den Wolken - Hommage an Bettine von Arnim
Samuel Adler: A Celebration of Sam @ 95: Piano Music and Songs