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 0x8982c226487eeb241428d2ebf04855b640348363ee27e377bf1c0f31e30888c6. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f885a4f8-f2f4-49e9-ad47-44f9ac5c5598.json and https://artists.proofprofile.net/proofs/artist/f885a4f8-f2f4-49e9-ad47-44f9ac5c5598.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Far Far from Each Other (Lied Trios for Baritone, Viola or Horn and Piano)
Das Sühnopfer des neuen Bundes, Pt. 1: No. 1, Wo find' ich ihn, der meiner Augen Licht
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 0x65c8d1edad1b85867e0393cc5dbe93e886455543e7ab24abe5d1dc8f44c3901a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEU921909601.
Das Sühnopfer des neuen Bundes, Pt. 1: No. 10, Mich hat herzlich verlanget
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbef89f6c5db91bf8d7f9801e4e2d6851771c52574d88b673514a6fb3dfee6250. 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/DEU921909610.
Das Sühnopfer des neuen Bundes, Pt. 1: No. 11, Da sie aber assen, nahm Jesus das Brot
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x297f17e426747ce7710c8c802f4a351fd2eea966b2f92195438009e0d44fd8ba. 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/DEU921909611.
Das Sühnopfer des neuen Bundes, Pt. 2: No. 21, Pilatus ging hinein in das Richthaus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x974e87add63a49482545a831ae368b021318bb2963d81c1d5cdb7366cb6b66dd. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:07:55Z), 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/DEU921909621.