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 0x09cd67968a2d3d56d339fdd70c0b3c74d7d2d5d3bf2a12f19463697d653007f7. Chain 2 (Bitcoin): anchored in block 954603 (2026-06-20T21:47:54Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c33379f9-89d4-4bdd-a5e9-bbfbc2c984d1.json and https://artists.proofprofile.net/proofs/artist/c33379f9-89d4-4bdd-a5e9-bbfbc2c984d1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Aufstieg und Fall der Stadt Mahagonny: Act I: Halloh, wir mussen weiter! (Fatty, Moses, Begbick)
Weill, K.: Aufstieg Und Fall Der Stadt Mahagonny [Opera]
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 0xf5d132a0848d1790dd2df6e30472006a0a731543b47ec2dbab55a3c2963b818c. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/US2TL0901001.
Aufstieg und Fall der Stadt Mahagonny: Act I: Oh show us the way to the next whisky bar (Jenny, 6 girls)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde2074b3912b8e0597d9dfd1b687a3c89d0df7b266eabfee567a170a7f3efa56. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/US2TL0901002.
Aufstieg und Fall der Stadt Mahagonny: Act I: Wir wohnen in den Stadten (Male Chorus, Fatty, Moses )
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x502bad565fa85be573c92e0783b6b5b54bb0081db2481df915c06ebe5d2b9e7d. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/US2TL0901003.
Aufstieg und Fall der Stadt Mahagonny: Act I: Auf nach Mahagonny (Jim, Jack, Bill, Joe)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x525cc754ea41abf253c71607dc649dc0cac6672ca138e6c5fa54dda0f72c5b8b. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/US2TL0901004.
Aufstieg und Fall der Stadt Mahagonny: Act I: Wenn man an einen fremden Strand kommt (Jim, Jack, Bill, Joe, Begbick, 6 girls)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x414ece0dff5a8509622a06469dd3013552d77c780d1b911b7dc9e36507a02339. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/US2TL0901005.