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 0xc89530ee099b1c3fc9e0b064ebfe361179b8b970c8b0cab9648345ebea65a96b. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4b24d6f0-bda6-403d-bea3-0cbd7224fc33.json and https://artists.proofprofile.net/proofs/artist/4b24d6f0-bda6-403d-bea3-0cbd7224fc33.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Bach, J.S.: Complete Sinfonias from Cantatas (Rilling)
Leichtgesinnte Flattergeister, BWV 181: Aria: Leichtgesinnte Flattergeister (Bass)
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 0x24899958f58095b86e985c76b5827546e7877b505dcc8178cc10ac78a8861b6a. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/DEA550003616.
Leichtgesinnte Flattergeister, BWV 181: Lass, Hochster, uns zu allen Zeiten (Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c443de8f7553f1c03e57100d2d950c2e61274d1993de6a98e4bc0f3c6f13000. 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/DEA550003620.
Figuralchor Der Gedächtniskirche Stuttgart
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x763f0cc3ec4d3bde4298030172be70e276de59596a58c604defadc50ee678986. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DEA559902510.
Herr Gott, dich loben alle wir, BWV 130: Aria: Der alte Drache brennt vor Neid (Bass)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd8bd3b093bd7b561263f30ad6266816d43793a455d5aa8694b6b9decded2451. 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/DEA559902512.
Herr Gott, dich loben alle wir, BWV 130: Aria: Lass, o Furst der Cherubinen (Tenor)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb2df38dd23e43709894293ee8b874884e8be9b2f018a188704bb5a97a8aca6. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/DEA559902514.
Aus der Tiefen rufe ich, Herr, zu dir, BWV 131: Sinfonia: Aus der Tiefen rufe ich, Herr, zu dir (Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e9702ea364c2b567efb861df3e63428c3f4cf3d4dbc5834796a68270f097947. 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/DEA559902516.
Aus der Tiefen rufe ich, Herr, zu dir, BWV 131: Arioso with Chorale: So du willst, Herr, Sunde zurechnen (Bass)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70a56977928d9157771c3eb37c0079401b04020e328885bf39f502efb3b1d534. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DEA559902517.
Aus der Tiefen rufe ich, Herr, zu dir, BWV 131: Ich harre des Herrn, meine Seele harret (Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25c3e2165720de5920dc2c27e992b5e48f2483578f5b22aaaa22d83a39bcee05. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/DEA559902518.